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WorksheetsUnit 3: Forces Test Review
Total questions: 34
Worksheet time: 17mins
Name
Class
Date
1.
When an unbalanced force acts on an object, the force...
a)
changes the motion of the object.
b)
is canceled by another force.
c)
does not change the motion of the object.
d)
is equal to the weight of the object.
2.
Objects falling through the sky experience which type of friction?
a)
rolling friction.
b)
sliding friction.
c)
centripetal force.
d)
air resistance.
3.
The resistance of an object to any change in its motion is called...
a)
inertia.
b)
friction.
c)
gravity.
d)
weight.
4.
Balanced forces are equal forces acting on an object in opposite directions.
a)
True
b)
False
5.
Rolling friction occurs when two solid surfaces slide over each other.
a)
True
b)
False (Sliding Friction)
6.
The law of universal gravitation states that the total momentum of objects that interact does not change.
a)
True
b)
False (law of conservation of momentum)
7.
What force makes it less likely for a person to slip on a dry sidewalk as opposed to an icy sidewalk?
a)
air resistance
b)
friction
c)
momentum
8.
Which of the following is determined by the force of gravity?
a)
weight
b)
momentum
c)
mass
d)
distance
9.
Which of the following is an example of exerting a force?
a)
a child running through a field
b)
a train speeding down a tack
c)
a carpenter hammering a nail
d)
an airplane soaring through the sky
10.
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.
11.
The tendency of an object to resist change in its motion is known as...
a)
mass
b)
inertia
c)
force
d)
balance
12.
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.
13.
One way to increase acceleration is by....
a)
increasing mass.
b)
decreasing mass.
c)
decreasing force.
d)
increasing both force and mass proportionally.
14.
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
15.
Which of the following is an example of rolling friction?
a)
your shoes on a sidewalk as you walk
b)
bike tires on the road as you ride
c)
a boat on the water as it sails
d)
two hands rubbing together
16.
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
17.
The law of universal gravitation states that any two object in the universe, without exception,
a)
attract each other.
b)
repel each other.
c)
combine to provide a balanced force.
d)
create friction.
18.
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.
19.
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
20.
In science, a push or pull is called a(n)
a)
force
b)
acceleration
c)
inertia
d)
motion
21.
The amount of matter in an object is called its...
a)
inertia.
b)
mass.
c)
force.
d)
balance.
22.
Which of the following is an example of increasing friction intentionally?
a)
waxing skis.
b)
adding grease to gears on a bike.
c)
throwing sand on an icy driveway
d)
oiling a squeaky door
23.
The force that pulls falling objects toward Earth is called...
a)
gravity.
b)
free fall.
c)
acceleration.
d)
air resistance.
24.
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.
25.
The unit for force is...
a)
newton.
b)
meter.
c)
kilogram.
d)
pound.
26.
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.
27.
According to Newton's second law of motion, weight depends on an object's mass and the net force acting on the object.
a)
True
b)
False (Acceleration)
28.
Newton's third law of motion states for every action there is an equal, by opposite reaction.
a)
True
b)
False (Unbalanced Force)
29.
A full grocery cart requires more force to push than an empty cart.
a)
Newton's First Law
b)
Newton's Second Law
c)
Newton's Third Law
30.
A pencil on a table will stay there until someone picks it up.
a)
Newton's First Law
b)
Newton's Second Law
c)
Newton's Third Law
31.
A fireman turns on a hose and is knocked backwards.
a)
Newton's First Law
b)
Newton's Second Law
c)
Newton's Third Law
32.
The winning race dog ran at an average speed of 21 mph.
a)
Speed
b)
Velocity
c)
Acceleration
33.
The jet ski skimmed across that lake at 55 mph southeast.
a)
Speed
b)
Velocity
c)
Acceleration
34.
The car slowed down at the train crossing because the crossbars lowered.
a)
Speed
b)
Velocity
c)
Acceleration
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