1. The SI unit for speed is
5. Frictional forces are greatest when both
surfaces are rough.
A. Miles per hour
A. true
B. meters per second
B. false
2. The combination of all of the forces acting
on an object is called the
6. An object is in motion when
A. net force
A. the object changes position relative to a
stationary reference point.
B. total force
B. you observe the object move.
3. If the net force acting on a stationary
object is zero, then the object will
7. An object that changes position relative to
a reference point is
A. stationary
A. Accelerate
B. in motion
B. remain at rest
4. If the net force on an object is zero then
the object has
8. Average speed can be represented by the
mathematical expression
A. balanced forces
A. distance/time
B. unbalanced forces
B. distance x time
9. The _____ of an object consists of its
speed and direction.
13. What happens when a car slows down
and velocity changes?
A. displacement
A. positive acceleration
B. velocity
B. negative acceleration
10. Displacement must always indicate
14. Net force is
A. direction
A. the combination of all the forces acting on
an object.
B. speed
B. the force of gravity pulling the object
down.
11. Speeding up, slowing down, and
changing direction is best described as
A. velocity
B. acceleration
12. When centripetal acceleration occurs, an
object
15. An object experiencing balanced forces
A. is speeding up
B. has a net force of zero
16. A game of tug-of-war with a winner is an
example of
A. balanced forces
A. changes direction
B. unbalanced forces
B. slows down
17. In order to increase a car’s speed, the
force pushing it forward must be
A. rolling friction
21. Friction is defined as the
A. rate at which velocity changes
B. force that opposes motion
B. kinetic friction
18. The distance traveled by an object
divided by the time it takes to travel that
distance is called
A. average speed
B. average velocity
19. The difference between speed and
velocity is that velocity includes
22. An object is in motion when
A. the object changes position relative to a
frame of reference
B. friction occurs
23. Force is a quantity made up of
A. weight and speed
A. distance
B. direction
20. An example of helpful friction is
B. magnitude and direction
24. Acceleration is defined as the change in
velocity divided by
A. writing on paper with a pen
B. car tires wearing out
A. time
B. distance
25. In order to determine speed, you must
know
29. The law that states that the unbalanced
force acting on an object equals the object’s
mass times its acceleration is
A. only distance
A. Newton’s 2nd law
B. both time and distance
B. Newton’s 3rd law
26. Of the following, the greatest
gravitational force would occur between
30. What is the unbalanced force that slows
down a ball rolling across the floor?
A. the moon and Earth
A. friction
B. a marble and a baseball
B. gravity
27. The law that states that every object
maintains constant velocity unless acted on
by an unbalanced force is
31. If two objects with different masses and
traveling with different velocities collide,
what law allows you to predict the motion of
the objects after the collision?
A. Newton’s 1st law
A. the law of conservation of momentum
B. Newton’s 3rd law
B. the law of universal gravitation
28. The law that states that for every action
force there is an equal and opposite reaction
force is
32. A stone will not move unless something
pushes or pulls it.
st
A. Newton’s 1 law
rd
B. Newton’s 3 law
A. Newton’s 1st law
B. Newton’s 3rd law
33. Which object has the greatest inertia?
37. Which statement about weight is
incorrect/
A. tennis ball
B. bowling ball
A. An object weighs more on the moon than
it weighs on Earth.
B. A change in an object’s location can
change the object’s weight.
34. What force causes a skater sliding on the
ice to gradually slow down?
38. An object’s momentum is determined by
the object’s
A. weight and velocity.
A. friction
B. mass and velocity.
B. inertia
35. Which of the following objects exerts a
the largest gravitational force?
39. Which of the following has a momentum
of zero?
A. a feather
A. newspaper lying on a table
B. a book
B. a leaf falling to the ground
36. Increasing which of these conditions
results in more gravitational force between
two objects?
40. The SI unit of force, named after the
scientist who described the relationship
between motion and force, is called the
A. newton
A. mass
B. curie
B. distance
41. When air resistance balances the weight
of a falling object, the velocity
45. Whenever an object is standing still,
which value is always zero?
A. rapidly increases.
A. momentum
B. remains constant.
B. inertia
42. The weight of an object can be calculated
by multiplying mass by
46. A tug-of-war that results in one team
pulling the other across the line is an
example of
A. speed.
A. unbalanced forces.
B. free-fall acceleration.
B. balanced forces
43. Which object does not have momentum?
47. Weight is best described as
A. a fish swimming in a pond
A. the downward force exerted on an object
due to gravity.
B. a rock by the side of the road
B. a force solely dependent on an object’s
mass.
44. What is the reaction force when you
place a cup on a table?
48. Which of the following units is used to
measure acceleration?
A. the force of the table on the cup
A. m/s
B. the force of gravity on the cup
B. m/s2
49. The tendency of an object at rest to
remain at rest is
50. Near Earth’s surface, the strongest
gravitational force would occur between an
elephant and
A. inertia.
A. the moon.
B. free fall.
b. Earth.