Physics

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1. ___________ is the rate at which distance is traveled
speed
2. ______ is speed with direction
velocity
3. _________speed is speed at any moment
instantaneous
4. _________ speed is the totale distance divided by total time for a trip
average
5. ___________ is the rate at which velocity changes
acceleration
6. a __________ has both magnitude and direction
vector
7. if you walk away from a motion detector, the distance-time graph slopes _______
up
8. if you walk towards a motion detector, the distance-time graph slopes ________
down
9. if you stand still, the distance-time graph is ________
flat
10. if you walk towards the motion detector, the velocity is _________
negative
11. if you walk away from the motion detector, the velocity is _________
positive
12. if you stand still, the velocity is _______________
zero
13. if you walk more quickly, the slope of the graph is _________
steeper
14. the word __________ means size or amount
magnitude
15. if you are standing on a moving bus, you are at rest _______ to the bus, but moving ______ to the ground outside
relative
16. ___________ is measured in the unit m/s2
acceleration
17. a ____________ has magnitude but no direction
scalar
18. ____________ is the stretching force in a string
tension
19. the sum of two vectors is called the _________
resultant
20. an object moving in the air only affected by gravity is called a _____________
projectile
21. a vector can be resolved into two _______________, horizontal and vertical
components
22. ______________ is the force between objects as they slide across each other
friction
23. __________ is an object's resistance to a change in its motion
inertia
24. an object's ________ changes as the object moves from the Earth to the moon
weight
25. an object's ______ doesnt change as it moves from the Earth to the moon
mass
26. __________ is the unit for force
Newton
27. __________ is the quantity of matter in an object, it is measured in kilograms
mass
28. _____ is the force of gravity on an object
weight
29. the combination of all forces acting on an object is called the _______________
net force
30. A book sits on the table. The table pushes up on it. The name of this force is the __________ force
normal
31. __________________ is when the net force on an object is zero
equilibrium
32. if i push a box to the right, the direction of friction on it is to the ____________
left
33. ___________ is the unit for pressure
pascal
34. Newton's third law says that when two objects collide, the forces on them are always ___________
equal
35. A skydiver moves at a constant speed called the ___________ speed when her weight equals the force of air resistance on her
terminal
36. as a skydiver's speed increases, the force of air resistance on her _________________
increases
37. ______________ is the amount of force per area
pressure
38. What does Newton's third law say?
For every action, there is an equal and opposite reaction
39. What does Newton's first law say?
AN object at rest will stay at rest and an object in motion will stay in motion at a constant velocity unless acted on by an outside net force
40. __________ causes a change in momentum
impulse
41. an objects ____________ depends on its mass and velocity
momentum
42. The law of ____________________________ says that the total momentum of two objects before a collision is the same as the total momentum after the collision
conservation of momentum
43. an ____________ collision occurs when two objects bounce
elastic
44. an _________________ collision occurs when two objects stick together
inelastic
45. an ________________ is when two objects start together and end separate
explosion
46. ________ is done when an object is moved by a force
work
47. ______________ is the unit at which work and energy are measured
joules
48. ________ is the rate at which work is done
power
49. one ________ equals one joule per second
watt
50. ______________ energy is stored energy
potential
51. if you lift an object, you give it ___________________ potential energy
gravitational
52. if an object is moving, it has ______ energy
kinetic
53. the law of ________________________________ states that energy can neither be created or destroyed
conservation of energy
54. If you hold an object above the ground, it has ___________________ energy. As it falls, it gains ___________ energy and loses _______ energy. The total amount of energy at any point in its fall is ____________.
gravitational potential, kinetic, gravitational potential, constant
55. A force that acts perpendicular to the motion of an object is called the _____________ force and it makes the object ______________________________________.
centripetal, turn in a circular path
56. The gravitational force between two objects depends on their ________________ and the ________ between their centers
masses, distance
 Author: kkbrum ID: 129273 Card Set: Physics Updated: 2012-01-21T01:11:42Z Folders: Description: Physics 1 Mid-year Review Show Answers: