# Physical Science Final May 2014

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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

a) mass

b) mass divided by the net force acting on you

c) mass times the acceleration due to gravity

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

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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 Author: levanjm ID: 274948 Filename: Physical Science Final May 2014 Updated: 2014-05-21 03:03:04 Tags: Science Final Review Folders: Description: Science Final Review Show Answers:

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