Name: 
 

Force & Motion



Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

The ability to do work is called
a.
velocity.
b.
energy.
c.
conversion.
d.
friction.
 

 2. 

Energy is measured in units called
a.
joules.
b.
pounds.
c.
meters.
d.
horsepower.
 

 3. 

The energy associated with motion is called
a.
kinetic energy.
b.
elastic potential energy.
c.
gravitational potential energy.
d.
nuclear energy.
 

 4. 

Kinetic energy increases as
a.
mass increases and velocity decreases.
b.
mass decreases and velocity increases.
c.
both mass and velocity increase.
d.
both mass and velocity decrease.
 

 5. 

The total potential and kinetic energy of the particles in an object is called
a.
mechanical energy.
b.
thermal energy.
c.
chemical energy.
d.
electrical energy.
 

 6. 

When you rub your hands together on a cold day, you use friction to convert
a.
mechanical energy into thermal energy.
b.
thermal energy into nuclear energy.
c.
nuclear energy into electrical energy.
d.
electrical energy into electromagnetic energy.
 

 7. 

An example of a fossil fuel is
a.
wood.
b.
petroleum.
c.
the sun.
d.
water.
 

 8. 

Which of the following has kinetic energy?
a.
a rock poised for a fall
b.
an archer’s bow that is drawn back
c.
a rolling bowling ball
d.
a car waiting at a red light
 

 9. 

Unlike kinetic energy, potential energy is
a.
energy of motion.
b.
stored.
c.
conserved.
d.
not measurable.
 

 10. 

Potential energy that depends on height is called
a.
kinetic energy.
b.
gravitational potential energy.
c.
elastic potential energy.
d.
mechanical energy.
 

 11. 

The law of conservation of energy states that when one form of energy is converted into another,
a.
energy is destroyed in the process.
b.
no energy is destroyed in the process.
c.
energy is created in the process.
d.
some amount of energy cannot be accounted for.
 

 12. 

Which of the following is an example of exerting a force?
a.
a child running through a field
b.
a train speeding down a track
c.
a carpenter hammering a nail
d.
an airplane soaring through the sky
 

 13. 

What happens when two forces act in the same direction?
a.
They cancel each other out.
b.
The stronger one prevails.
c.
They add together.
d.
Their sum divided by two is the total force.
 

 14. 

The tendency of an object to resist change in its motion is known as
a.
mass.
b.
inertia.
c.
force.
d.
balance.
 

 15. 

The greater the mass of an object,
a.
the easier the object starts moving.
b.
the greater its inertia.
c.
the more balanced it is.
d.
the more space it takes up.
 

 16. 

The force of gravity on a person or object on the surface of a planet is called
a.
mass.
b.
terminal velocity.
c.
weight.
d.
free fall.
 

 17. 

One way to increase acceleration is by
a.
increasing mass.
b.
decreasing mass.
c.
decreasing force.
d.
increasing both force and mass proportionally.
 

 18. 

The force that one surface exerts on another when the two rub against each other is called
a.
friction.
b.
acceleration.
c.
inertia.
d.
gravity.
 

 19. 

When the only force acting on a falling object is gravity, the object is said to be
a.
stationary.
b.
decelerating.
c.
in free fall.
d.
a projectile.
 

 20. 

Air resistance is a type of
a.
motion.
b.
acceleration.
c.
velocity.
d.
friction.
 

 21. 

The force of gravity on a person or object at the surface of a planet is known as
a.
mass.
b.
inertia.
c.
air resistance.
d.
weight.
 

 22. 

The law of universal gravitation states that any two objects in the universe, without exception,
a.
attract each other.
b.
repel each other.
c.
combine to provide a balanced force.
d.
create friction.
 

 23. 

Forces can be added together only if they are
a.
acting on the same object.
b.
balanced forces.
c.
unaffected by gravity.
d.
substantial.
 

 24. 

The product of an object’s mass and velocity is called its
a.
inertia.
b.
momentum.
c.
acceleration.
d.
force.
 

 25. 

According to the law of conservation of momentum, when two objects collide in the absence of friction,
a.
velocity decreases.
b.
velocity increases.
c.
momentum is not lost.
d.
only the object with the larger mass continues on.
 

 26. 

The achievement of lifting a rocket off the ground and into space can be explained by
a.
Newton’s first law.
b.
Newton’s second law.
c.
Newton’s third law.
d.
the law of conservation of momentum.
 

 27. 

What is required for a rocket to lift off into space?
a.
thrust that is greater than Earth’s gravity
b.
mass that is greater than Earth’s
c.
very little air resistance
d.
more velocity than friction
 

 28. 

An object that travels around another object in space is called a(n)
a.
projectile.
b.
inertia.
c.
mass.
d.
satellite.
 

 29. 

Any force that causes an object to move in a circle is called a(n)
a.
balanced force.
b.
unbalanced force.
c.
gravitational force.
d.
centripetal force.
 

 30. 

In physical science, a push or a pull is called a(n)
a.
force.
b.
acceleration.
c.
inertia.
d.
motion.
 

 31. 

The momentum of an object is in the same direction as its
a.
force.
b.
acceleration.
c.
velocity.
d.
inertia.
 

 32. 

How can you increase the momentum of an object?
a.
by decreasing its velocity
b.
by increasing its mass
c.
by increasing its friction
d.
by decreasing its acceleration
 

 33. 

The amount of matter in an object is called its
a.
inertia.
b.
mass.
c.
force.
d.
balance.
 

 34. 

The force that pulls falling objects toward Earth is called
a.
gravity.
b.
free fall.
c.
acceleration.
d.
air resistance.
 

 35. 

Objects falling through air experience a type of friction called
a.
terminal velocity.
b.
air resistance.
c.
inertia.
d.
rolling friction.
 

 36. 

According to Newton’s third law of motion, when a hammer strikes and exerts force on a nail, the nail
a.
creates a friction with the hammer.
b.
disappears into the wood.
c.
exerts an equal force back on the hammer.
d.
moves at a constant speed.
 

 37. 

The SI unit for force is the
a.
newton.
b.
meter.
c.
kilogram.
d.
pound.
 

 38. 

Balanced forces acting on an object
a.
always change the object’s motion.
b.
sometimes change the object’s motion.
c.
never change the object’s motion.
d.
are not related to motion.
 

 39. 

When an object’s distance from another object is changing,
a.
it is in motion.
b.
it is speeding.
c.
it has a high velocity.
d.
it is accelerating.
 

 40. 

The basic SI unit of length is the
a.
meter.
b.
foot.
c.
inch.
d.
mile.
 

 41. 

Speed equals distance divided by
a.
time.
b.
velocity.
c.
size.
d.
motion.
 

 42. 

When you know both the speed and direction of an object’s motion, you know the
a.
average speed of the object.
b.
acceleration of the object.
c.
distance the object has traveled.
d.
velocity of the object.
 

 43. 

You can show the motion of an object on a line graph in which you plot distance against
a.
velocity.
b.
time.
c.
speed.
d.
direction.
 

 44. 

The steepness of a line on a graph is called the
a.
rise.
b.
run.
c.
slope.
d.
the vertical axis.
 

 45. 

The upper layer of Earth consists of more than a dozen major pieces called
a.
units.
b.
plates.
c.
continents.
d.
tectonics.
 

 46. 

If one of Earth’s plates moves 5 centimeters every year, how far will it move in 500 years?
a.
25 kilometers
b.
25 centimeters
c.
25 meters
d.
250 meters
 

 47. 

The rate at which velocity changes is called
a.
instantaneous speed.
b.
direction.
c.
acceleration.
d.
motion.
 

 48. 

To determine the acceleration rate of an object, you must calculate the change in speed during each unit of
a.
velocity.
b.
time.
c.
motion.
d.
deceleration.
 

 49. 

If speed is measured in kilometers per hour and time is measured in hours, the unit of acceleration is
a.
hours.
b.
kilometers per hour.
c.
kilometers per hour per hour.
d.
kilometers.
 

 50. 

A place or object used for comparison to determine if something is in motion is called
a.
a position.
b.
a reference point.
c.
a constant.
d.
velocity.
 

 51. 

On a graph showing distance versus time, a horizontal line represents an object that is
a.
moving at a constant speed.
b.
increasing its speed.
c.
decreasing its speed.
d.
not moving at all.
 

 52. 

The International System of Units is used
a.
only in the United States.
b.
only in France.
c.
in most of Europe.
d.
all over the world.
 

 53. 

According to the theory of plate tectonics,
a.
Earth’s crust is made of molten material.
b.
Earth’s plates move slowly.
c.
Earth’s surface has not changed over time.
d.
Earth’s plates move at the same speed as Earth rotates on its axis.
 

 54. 

If you know the distance an object has traveled in a certain amount of time, you can determine
a.
the size of the object.
b.
the speed of the object.
c.
the location of the object.
d.
the acceleration of the object.
 

 55. 

If the speed of an object does NOT change, the object is traveling at a
a.
constant speed.
b.
average speed.
c.
increasing speed.
d.
decreasing speed.
 

 56. 

If a bicyclist travels 30 kilometers in two hours, her average speed is
a.
30 km/h.
b.
60 km/h.
c.
15 km/h.
d.
2 km/h.
 

 57. 

If you know a car traveled 300 kilometers in 3 hours, you can find its
a.
acceleration.
b.
direction.
c.
average speed.
d.
velocity.
 

 58. 

In an acceleration graph showing speed versus time, a straight line shows the acceleration is
a.
decreasing.
b.
increasing.
c.
changing.
d.
constant.
 

 59. 

Earth’s plates move a few millimeters to several centimeters each
a.
day.
b.
week.
c.
month.
d.
year.
 

 60. 

Knowing the average speed of Earth’s plates helps scientists
a.
avoid collisions between the plates.
b.
feel the plates moving.
c.
predict future changes.
d.
prevent earthquakes.
 



 
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