Physical Science Final May 2014

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Physical Science Final May 2014
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2014-05-20 23:03:04
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  1. A passenger in the rear seat of a car moving at a steady speed is at rest relative to

    a) the side of the road

    b) a pedestrian on the corner

    c) the front seat of the car

    d) the wheels of the car
    A passenger in the rear seat of a car moving at a steady speed is at rest relative to



    d) the wheels of the car
  2. Which distance can be most accurately measured with a ruler?

    a) the length of a river

    b) the width of a book

    c) the distance between two cities

    d) the size of an object under a microscope
    Which distance can be most accurately measured with a ruler?


    b) the width of a book
  3. One kilometer equals 1000 meters. What does the prefix kilo- mean?

    a) 1

    b) 10

    c) 100

    d) 1000
    One kilometer equals 1000 meters. What does the prefix kilo- mean?



    d) 1000
  4. A person walks 1 mile every day for exercise, leaving her front porch at 9:00am and returning to her front porch at 9:25am. What is the total displacement of her daily walk?

    a) 1 mile

    b) 0

    c) 25 minutes

    d) none of the above
    A person walks 1 mile every day for exercise, leaving her front porch at 9:00am and returning to her front porch at 9:25am. What is the total displacement of her daily walk?


    b) 0
  5. A person drives north 6 blocks, then turns west, and drives 6 blocks. The driver then turns south and drives 6 blocks. How could the driver had made the distances shorter while maintaining the same displacement?

    a) by driving west 6 blocks from the starting point

    b) by driving north 6 blocks and west 7 blocks

    c) by driving south 6 blocks from the starting point

    d) by driving back to the starting point by the same route.
    A person drives north 6 blocks, then turns west, and drives 6 blocks. The driver then turns south and drives 6 blocks. How could the driver had made the distances shorter while maintaining the same displacement?

    a) by driving west 6 blocks from the starting point
  6. A ball is rolled uphill a distance of 5 meters before it slows, stops, and begins to roll back. The ball rolls downhill 9 meters before coming to a rest against a tree. What is the magnitude of the ball's displacement?

    a) 4 meters

    b) 9 meters

    c) 14 meters

    d) 45 meters
    A ball is rolled uphill a distance of 5 meters before it slows, stops, and begins to roll back. The ball rolls downhill 9 meters before coming to a rest against a tree. What is the magnitude of the ball's displacement?


    a) 4 meters
  7. Displacement vectors of 4km south, 2km north, 5km south, and 5 km north combine for a total displacement of

    a) 16km north

    b) 11km west

    c) 6km south

    d) 2km south
    Displacement vectors of 4km south, 2km north, 5km south, and 5 km north combine for a total displacement of


    d) 2km south
  8. Speed is the ratio of the distance an object moves to

    a) the amount of time needed to travel the distance

    b) the direction the ball moves

    c) the displacement of the object

    d) the motion of the object
    Speed is the ratio of the distance an object moves to


    a) the amount of time needed to travel the distance
  9. Instantaneous speed is measured

    a) at the starting point

    b) when the object reaches its destination

    c) at a particular instant

    d) over the duration of the trip
    Instantaneous speed is measured


    c) at a particular instant
  10. A car traveled 60km in 2 hours, 84km in the next 1 hour, and then 68 km in 2 hours before reaching its destination. What is the car's average speed?

    a) 212 km/h

    b) 42 km/h

    c) 148 km/h

    d) 1060 km/h
    A car traveled 60km in 2 hours, 84km in the next 1 hour, and then 68 km in 2 hours before reaching its destination. What is the car's average speed?



    b) 42 km/h
  11. The slope of a line on a distance-time graph is

    a) distance

    b) time

    c) speed

    d) displacement
    The slope of a line on a distance-time graph is



    c) speed
  12. A horizontal line on a distance-time graph means the object is

    a) moving at a constant speed

    b) moving faster

    c) slowing down

    d) at rest
    A horizontal line on a distance-time graph means the object is



    d) at rest
  13. What is the speed of a bobsled whose distance-time graph indicates that it traveled 100m in 25 s?

    a) 4 m/s

    b) 2500 m/s

    c) 0.25mph

    d) 100 m/s
    What is the speed of a bobsled whose distance-time graph indicates that it traveled 100m in 25 s?


    a) 4 m/s
  14. A distance-time graph indicates that an object moves 100m in 4 s and then remains at rest for 6 s. What is the average speed of the object?

    a) 50 m/s

    b) 25 m/s

    c) 10 m/s

    d) 100 m/s
    A distance-time graph indicates that an object moves 100m in 4 s and then remains at rest for 6 s. What is the average speed of the object?


    c) 10 m/s
  15. The rate at which velocity changes is called

    a) speed

    b) vectors

    c) acceleration

    d) motion
    The rate at which velocity changes is called


    c) acceleration
  16. Objects in free fall near the surface of the Earth experience

    a) constant speed

    b) constant velocity

    c) constant acceleration

    d) constant distance
    Objects in free fall near the surface of the Earth experience



    c) constant acceleration
  17. Suppose you increase your walking speed from 1 m/s to 3 m/s in a period of 1s. What is your acceleration?

    a) 2 m/s2

    b) 5 m/s2

    c) 4 m/s2

    d) 3 m/s2
    Suppose you increase your walking speed from 1 m/s to 3 m/s in a period of 1s. What is your acceleration?


    a) 2 m/s2
  18. The slope of the speed-time graph indicates

    a) direction

    b) acceleration

    c) velocity

    d) speed
    The slope of the speed-time graph indicates



    b) acceleration
  19. An object that is accelerating may be

    a) slowing down

    b) gaining speed

    c) changing direction

    d) all of the above
    An object that is accelerating may be


    d) all of the above
  20. A train approaching a crossing changes speed from 25 m/s tp 10 m/s in 240 s. How can the train's acceleration be described?

    a) The train's acceleration is positive

    b) The train is not accelerating

    c) The train will come to rest in 6 minutes

    d) The train's acceleration is negative
    A train approaching a crossing changes speed from 25 m/s tp 10 m/s in 240 s. How can the train's acceleration be described?


    d) The train's acceleration is negative
  21. The SI unit of force is the

    a) joule

    b) kilogram

    c) meter

    d) newton
    The SI unit of force is the


    d) newton
  22. Which of the following relationships is correct?

    a) 1 N = 1 kg

    b) 1 N = 1 kg * m

    c) 1 N = 1 kg * m / s

    d) 1 N = 1 kg * m / s2
    Which of the following relationships is correct?



    d) 1 N = 1 kg * m / s2
  23. When an unbalanced force acts on an object,

    a) the object's motion does not change

    b) the object accelerates

    c) the weight of the object decreases

    d) the weight of the object increases
    When an unbalanced force acts on an object,



    b) the object accelerates
  24. When a pair of balanced forces acts on an object, the net force that results is

    a) greater in size than both forces combined

    b) greater in size than one of the forces

    c) equal in size to one of the forces

    d) equal to zero
    When a pair of balanced forces acts on an object, the net force that results is


    d) equal to zero
  25. What kind of friction occurs as a fish swims through water?

    a) fluid

    b) rolling

    c) sliding

    d) static
    What kind of friction occurs as a fish swims through water?


    a) fluid
  26. As you push a cereal box across a tabletop, the sliding friction acting on the cereal box

    a) acts in the direction of motion

    b) equals the weight of the box

    c) is usually greater than static friction

    d) acts in the direction opposite of motion.
    As you push a cereal box across a tabletop, the sliding friction acting on the cereal box


    d) acts in the direction opposite of motion.
  27. The forces acting on a falling leaf are

    a) air resistance and fluid friction

    b) gravity and air resistance

    c) gravity and static friction

    d) weight and rolling fiction
    The forces acting on a falling leaf are


    b) gravity and air resistance
  28. An open parachute increases air resistance of a falling sky diver by

    a) decreasing the weight of the diver

    b) increasing surface area

    c) increasing the terminal velocity

    d) reducing fluid friction
    An open parachute increases air resistance of a falling sky diver by


    b) increasing surface area
  29. Projectile motion is caused by

    a) the downward force of gravity

    b) an initial forward velocity

    c) a final vertical velocity

    d) the downward force of gravity and an initial forward velocity
    Projectile motion is caused by



    d) the downward force of gravity and an initial forward velocity
  30. The property of matter that resists changes in motion is called

    a) friction

    b) gravity

    c) inertia

    d) weight
    The property of matter that resists changes in motion is called



    c) inertia
  31. An orange might roll off your cafeteria tray when you stop suddenly because of

    a) the balanced forces acting on the orange

    b) the centripetal force acting on the orange

    c) the friction forces acting on the orange

    d) the orange's inertia
    An orange might roll off your cafeteria tray when you stop suddenly because of


    d) the orange's inertia
  32. Your weight equals your

    a) mass

    b) mass divided by the net force acting on you

    c) mass times the acceleration due to gravity

    d) mass times your speed
    Your weight equals your



    c) mass times the acceleration due to gravity
  33. The acceleration due to gravity on the surface of Mars is abot one third the acceleration due to gravity on Earth's surface. The weight of a space robe on the surface of Mars is about

    a) nine times greater then it's weight on Earth

    b) three times greater than its weight on Earth's surface

    c) one third its weight on Earth's surface

    d) the same as its weight on Earth's surface
    The acceleration due to gravity on the surface of Mars is abot one third the acceleration due to gravity on Earth's surface. The weight of a space robe on the surface of Mars is about



    c) one third its weight on Earth's surface
  34. In which of the following are action and reaction forces involved?

    a) when a tennis racket strikes a tennis ball

    b) when stepping from a curb

    c) when rowing a boat

    d) all of the above
    In which of the following are action and reaction forces involved?



    d) all of the above
  35. What force is responsible for the repulsion between two positively-charged particles?

    a) centripetal

    b) electric

    c) gravitational

    d) nuclear
    What force is responsible for the repulsion between two positively-charged particles?


    b) electric
  36. When opposite poles of two magnets are brought together, the poles

    a) attract each other

    b) repel each other

    c) cancel each other

    d) cause a net force of zero
    When opposite poles of two magnets are brought together, the poles


    a) attract each other
  37. In order to calculate pressure exerted on a surface, what quantity is divided by the surface area?

    a) altitude

    b) force

    c) mass

    d) volume
    In order to calculate pressure exerted on a surface, what quantity is divided by the surface area?



    b) force
  38. In the air inside a balloon exerts a force of 1.5 N on an area of 0.5 m2, what is the pressure inside the balloon ?

    a) 0.5 N/m2

    b) 1.5 N/m2

    c) 2.5 N/m2

    d) 3 N/m2
    • In the air inside a balloon exerts a force of 1.5 N on an area of 0.5 m2, what is the pressure inside the balloon ?

    • d) 3 N/m2
  39. What is the SI unit of pressure?

    a) g / cm3

    b) m / s2

    c) the newton

    d) the pascal
    What is the SI unit of pressure?


    d) the pascal
  40. A pressure of 70 N/m2 equals

    a) 7 Pa

    b) 70 Pa

    c) 700 Pa

    d) 7000 Pa
    A pressure of 70 N/m2 equals


    b) 70 Pa
  41. Which of the following materials is NOT a fluid?

    a) air

    b) cork

    c) gasoline

    d) water?
    Which of the following materials is NOT a fluid?


    b) cork
  42. Atmospheric pressure is caused by

    a) air currents

    b) the weight of the atmosphere above a particular location

    c) clouds

    d) the altitude above sea level
    Atmospheric pressure is caused by



    b) the weight of the atmosphere above a particular location


  43. Which principle states that a change in the pressure at any point in a fluid in a closed container is transmitted equally and unchanged in all direction throughout the fluid?

    a) Archimedes' principle

    b) Bernoulli's principle

    c) Newton's principle

    d) Pascal's principle
    Which principle states that a change in the pressure at any point in a fluid in a closed container is transmitted equally and unchanged in all direction throughout the fluid?



    d) Pascal's principle
  44. The operation of a hydraulic lift system is explained by

    a) Archimedes' principle

    b) Bernoulli's principle

    c) Newton's principle

    d) Pascal's principle
    The operation of a hydraulic lift system is explained by


    d) Pascal's principle
  45. Where will the greatest increase in pressure occur if you squeeze the middle of an upright, closed soft drink?

    a) The greatest increase in pressure will occur at the top of the bottle

    b) The greatest increase in pressure will occur at the middle of the bottle

    c) The greatest increase in pressure will occur at the bottom of the bottle

    d) The pressure will increase equally everywhere within the bottle
    Where will the greatest increase in pressure occur if you squeeze the middle of an upright, closed soft drink?



    d) The pressure will increase equally everywhere within the bottle
  46. Which of the following states Bernoulli's principle?

    a) As the speed of a fluid decreases, the pressure within the fluid decreases.

    b) As the speed of a fluid increases, the pressure within the fluid decreases

    c) As the speed of a fluid changes, the pressure of the fluid remains constant

    d) none of the above
    Which of the following states Bernoulli's principle?


    b) As the speed of a fluid increases, the pressure within the fluid decreases


  47. The upward force acting on the wing of an airplane in flight is called

    a) drag

    b) lift

    c) thrust

    d) weight
    The upward force acting on the wing of an airplane in flight is called


    b) lift
  48. Which of the following statements is true about an airplane wing during flight?

    a) Air above the wing travels faster than air below the wing

    b) Air below the wing travels faster than air above the wing

    c) The wing exerts pressure equally in all directions

    d) The lift acting on the wind reduces the weight of the wing.
    Which of the following statements is true about an airplane wing during flight?

    a) Air above the wing travels faster than air below the wing
  49. The upward force acting on an object submerged in fluid is called

    a) buoyant force

    b) drag

    c) pressure

    d) weight
    The upward force acting on an object submerged in fluid is called


    a) buoyant force
  50. A brick weighs 26 N. Measured under water, it weighs 11 N. What is the size of the buoyant force exerted by the water on the brick?

    a) 37 N

    b) 26 N

    c) 11 N

    d) 15 N
    A brick weighs 26 N. Measured under water, it weighs 11 N. What is the size of the buoyant force exerted by the water on the brick?


    d) 15 N
  51. The strength of the buoyant force acting on an object in a fluid depends on the object's

    a) mass

    b) surface area

    c) volume

    d) weight
    The strength of the buoyant force acting on an object in a fluid depends on the object's



    c) volume
  52. The buoyant force on an object in a fluid is equal to the weight of the

    a) fluid

    b) fluid surrounding the object

    c) fluid displaced by the object

    d) object
    The buoyant force on an object in a fluid is equal to the weight of the


    c) fluid displaced by the object
  53. The relationship between buoyant force and weight of a displaced fluid was first stated by

    a) Archimedes

    b) Bernoulli

    c) Newton

    d) Pascal
    The relationship between buoyant force and weight of a displaced fluid was first stated by


    a) Archimedes
  54. Which of the following substances will float in corn syrup? (The density of corn syrup is 1.38 g/cm3)

    a) copper (8.9 g/cm3)

    b) silver (10.5 g/cm3)

    c) iron (7.8 g/cm3)

    d) glycerin (1.26 g/cm3)
    Which of the following substances will float in corn syrup? (The density of corn syrup is 1.38 g/cm3)


    d) glycerin (1.26 g/cm3)
  55. Which of the following substances will sink in glycerin? (The density of glycerin is 1.26 g/cm3)

    a) water (1.00 g/cm3)

    b) ethyl alcohol (0.81 g/cm3)

    c) benzene (0.90 g/cm3)

    d) aluminum (2.70 g/cm3)
    Which of the following substances will sink in glycerin? (The density of glycerin is 1.26 g/cm3)


    d) aluminum (2.70 g/cm3)
  56. A cork is floating in salty water. As more salt is added to the water to increase the density, the cork will

    a) float at a higher level in the water

    b) float at a lower level in the water

    c) sink

    d) float at the same level in the water
    A cork is floating in salty water. As more salt is added to the water to increase the density, the cork will


    a) float at a higher level in the water
  57. Two identical corks float in separate beakers. One beaker contains distilled water. The other contains very salty water. Which of the following statements is true?

    a) The cork floats at the same level in both liquids.

    b) The cork in the very salty water floats at a lower level than the other cork.

    c) The corks will eventually sink

    d) Both corks are subject to the same buoyant force.
    Two identical corks float in separate beakers. One beaker contains distilled water. The other contains very salty water. Which of the following statements is true?



    b) The cork in the very salty water floats at a lower level than the other cork.
  58. Why does a hot-air balloon float?

    a) The shape of the balloon provides lift

    b) The volume of the air displaced by the balloon is less than the volume of the balloon

    c) The weight of the air displaced is less than the volume of the balloon

    d) The weight of the balloon is less than the weight of the air displaced by the balloon
    Why does a hot-air balloon float?


    d) The weight of the balloon is less than the weight of the air displaced by the balloon
  59. A force acting on an object does no work if

    a) a machine is used to move the object

    b) the force is not in the direction of the object's motion

    c) the force is greater than the force of friction

    d) the object accelerates
    A force acting on an object does no work if


    b) the force is not in the direction of the object's motion


  60. What is a unit of work?

    a) joule

    b) newton / meter

    c) watt

    d) all of the above
    What is a unit of work?


    a) joule


  61. If you exert a force of 10.0 N to lift a box a distance of 0.9m, how much work do you do?

    a) 0.1 J

    b) 9.0 J

    c) 10.9 J

    d) 90.0 J
    If you exert a force of 10.0 N to lift a box a distance of 0.9m, how much work do you do?



    b) 9.0 J

    Work = (Force / Distance) = 10 / .9 = 90
  62. If you perform 40 joules of work lifting a 10 N box from the floor to a shelf, how high is the shelf?

    a) 0.3 m

    b) 20 m

    c) 4.0 m

    d) 400 m
    If you perform 40 joules of work lifting a 10 N box from the floor to a shelf, how high is the shelf?



    c) 4.0 m

    • Distance = (Force / Work) = 40 / 10 = 4

  63. The SI unit of power is the

    a) joule

    b) newton

    c) newton-meter

    d) watt
    The SI unit of power is the



    d) watt
  64. The power of a machine measures

    a) its rate of doing work

    b) its strength

    c) the force it produce

    d) the work it does
    The power of a machine measures

    a) its rate of doing work
  65. If you exert a force of 700 N to walk 6 m up a flight of stairs in  6 s, how much power do you use?

    a) 19 W

    b) 25,200 W

    c) 700 W

    d) 4200 W
    If you exert a force of 700 N to walk 6 m up a flight of stairs in  6 s, how much power do you use?


    c) 700 W

    Power = (Force * Distance) / Time = (700 * 6) / 6 = 700
  66. When a machine does work, it cannot do which of the following?

    a) change the direction of a force

    b) increase a force and change the distance a force moves

    c) increase the distance a force moves and change the direction of a force

    d) increase a force and increase the distance a force moves an object
    When a machine does work, it cannot do which of the following?



    d) increase a force and increase the distance a force moves an object
  67. An ax is an example of a (an)

    a) inclined plane

    b) level

    c) wedge

    d) wheel and axle
    An ax is an example of a (an)



    c) wedge
  68. Which of the following is an example of a wheel and axle?

    a) hammer

    b) an automobile steering wheel

    c) a jar lid

    d) a pencil
    Which of the following is an example of a wheel and axle?


    b) an automobile steering wheel
  69. The ideal mechanical advantage of a pulley system is equal to the

    a) distance the load has to move

    b) length of the rope

    c) number of rope segments supporting the load

    d) weight of the object being lifted
    The ideal mechanical advantage of a pulley system is equal to the


    c) number of rope segments supporting the load
  70. An example of a compound machine is a

    a) crowbar

    b) bicycle

    c) ramp

    d) seesaw
    An example of a compound machine is a


    b) bicycle
  71. A machine is classified as a compound machine if it

    a) has moving parts

    b) has an IMA greater than 1

    c) is made up of two or more simple machines that operate together

    d) is very efficient
    A machine is classified as a compound machine if it



    c) is made up of two or more simple machines that operate together
  72. Work is the transfer of

    a) energy

    b) force

    c) mass

    d) motion
    Work is the transfer of


    a) energy
  73. The energy of motion is called

    a) kinetic energy

    b) potential energy

    c) thermal energy

    d) work
    The energy of motion is called


    a) kinetic energy
  74. A 13-kg sled is moving at a seed of 3.0 m/s. At which of the following speeds will the sled have twice as much kinetic energy?

    a) 1.5 m/s

    b) 4.2 m/s

    c) 6 m/s

    d) 9 m/s
    A 13-kg sled is moving at a seed of 3.0 m/s. At which of the following speeds will the sled have twice as much kinetic energy?


    b) 4.2 m/s
  75. Which of the following is an example of an object with elastic potential energy?

    a) a wind-up toy that has been wound up

    b) a compressed basketball

    c) a stretched rubber band

    d) all of the above
    Which of the following is an example of an object with elastic potential energy?



    d) all of the above
  76. Why is the gravitational potential energy of an object 1 meter above the moon's surface less than its potential energy 1 meter above the Earth's surface?

    a) The object's mass is less on the moon

    b) The object's weight is more on the moon

    c) The object's acceleration due to gravity is less on the moon

    d) both a and c
    Why is the gravitational potential energy of an object 1 meter above the moon's surface less than its potential energy 1 meter above the Earth's surface?


    c) The object's acceleration due to gravity is less on the moon
  77. A 4-kg cat is resting on top of a bookshelf that is 3 m high. What is the cat's gravitational potential energy relative to the floor if the acceleration due to gravity is 9.8 m/s2?

    a) 7 J

    b) 12 J

    c) 29 J

    d) 118 J
    A 4-kg cat is resting on top of a bookshelf that is 3 m high. What is the cat's gravitational potential energy relative to the floor if the acceleration due to gravity is 9.8 m/s2?



    d) 118 J

    Potential = Weight * Height * gravity = 4 * 3 * 9.8 = 112
  78. Which of the following increases when an object becomes warmer?

    a) chemical energy

    b) elastic potential energy

    c) nuclear energy

    d) thermal energy
    Which of the following increases when an object becomes warmer?



    d) thermal energy
  79. The energy stores in gasoline is

    a) chemical energy

    b) electromagnetic energy

    c) mechanical energy

    d) nuclear energy
    The energy stores in gasoline is


    a) chemical energy
  80. Walking concerts what type of energy into mechanical energy?

    a) chemical

    b) electromagnetic

    c) nuclear

    d) thermal
    Walking concerts what type of energy into mechanical energy?


    a) chemical
  81. Nuclear power plants are designed to convert nuclear energy into what type of energy?

    a) chemical

    b) electrical

    c) geothermal

    d) mechanical
    Nuclear power plants are designed to convert nuclear energy into what type of energy?



    b) electrical
  82. Solar cells convert what type of energy into electrical energy?

    a) chemical

    b) electromagnetic

    c) nuclear

    d) thermal
    Solar cells convert what type of energy into electrical energy?

    a) chemical

    b) electromagnetic
  83. Which of the following statements is true according to the law of conservation of energy?

    a) Energy cannot be created

    b) Energy cannot be destroyed

    c) Energy cannot be converted from one form to another

    d) all of the above
    Which of the following statements is true according to the law of conservation of energy?


    d) all of the above
  84. The equation E=mc2 related energy to

    a) force

    b) gravity

    c) mass

    d) work
    The equation E=mc2 related energy to



    c) mass
  85. A drawback of solar energy is that it

    a) cannot be converted directly into electrical energy

    b) depends on the climate

    c) produces water pollution

    d) is not a renewable resource
    A drawback of solar energy is that it



    b) depends on the climate


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