WorksheetsLaws of Motion Exam Practice
Total questions: 36
Worksheet time: 18mins
Forces always occur
as single quantities
by themselves
in pairs
in triplets
According to Newton's third law, if you push gently on something, it will push
gently on something else
on you only if you aren't moving
gently on you
on something only under the right conditions
Inertia changes as ____ changes.
Force
Velocity
Mass
Motion
For any object, the greater the force that's applied to it, the greater its ____ will be.
acceleration
inertia
gravity
velocity
The statement "to every action there is an equal and opposite reaction" is ____.
the law of conservation of momentum
Newton's first law of motion
Newton's second law of motion
Newton's third law of motion
A 400-N force acts on a 50-kg object. The acceleration of the object is ____.
8 m/s2
20000 m/s2
0.125 m/s2
450 m/s2
In the absence of (without) gravity, the path of a horizontally thrown ball would ____.
go straight up
follow a curved path
fall straight down
travel horizontally
The force required to maintain an object at a constant speed in space (no air resistance) is equal to
0, no additional force is necessary
the force required to stop it
the mass of the object
none of these
Object 1 has three times as much mass as object 2. Object 1 also has three times as much
inertia
gravitational acceleration
velocity
momentum
The Newton’s 1st law (law of inertia) states that an object
at rest will remain at rest unless acted on by an outside force
will continue moving at the same velocity unless an outside force acts on it
will continue moving in a straight line unless an outside force acts on it
all the other listed answers
There are two cats, both running and accelerating at 7 m/s/s, one weighs twice as much as the other. Which law would best be used to determine which dog has the most force?
Law of Conservation of Momentum
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
An object following a straight-line path at constant speed
has a net force acting on it in the direction of motion
has zero velocity
has increasing momentum
has equal and opposite forces acting on it
A car has a mass of 12000 kg and accelerates at 4 m/s2 . What is the magnitude of the force acting on the car?
48,000 m/s
48,000 N
3,000 N
0.0003 N
A tow truck exerts a force of 4000 N on a car, accelerating it at 3 m/s/s. What is the mass of the car?
1,333.3 N
1,333.3 kg
4,000 N
4,000 kg
You are riding your bike and accidentally hit a curb, your bike stops, sending you flying over the handlebars. Which law best explains what happened?
Newton's 1st law
Newton's 2nd law
Newton's 3rd law
They all explain it equally
A player hits a baseball with a baseball bat. The action force is the impact of the bat against the ball. What is the reaction to this force?
Air resistance on the ball
The force of the ball against the bat
The weight of the ball
Grip of the player's hand against the bat
As a ball falls, the action force is the pull of the earth's mass on the ball. What is the reaction to this force?
Air resistance acting against the ball
Nonexistent in this case
The acceleration of the ball
The pull of the ball's mass on the Earth
An unfortunate bug splatters against the windshield of a moving car. Compared to the force of the car on the bug, the force of the bug on the car is
larger
the same
smaller
need more information to say
A car with momentum of 40 kg-m/s and a second car with momentum of 58 kg-m/s collide. What is the total momentum for the system after the collision?
98 kg-m/s
18 kg-m/s
2,320 kg-m/s
1.45 kg-m/s
A Mack truck and a Smart car traveling at the same speed collide head on. Which had greatest momentum before the collision?
The Mack truck
The Smart car
Momentum will be same for both
A student pulls a sled, that weighs 80 newtons, with a force of 10 newtons. What is the amount of the force that the sled pulls back on the student?
10 N
8 N
800 N
80 N
The reason airbags are used in cars is that they
look nice and feel good
decrease the mass in a collison
increase the force of impact in a collision
increase the the time of impact (time to change velocity) in a collision
Which cart has the greatest inertia?
1 kg cart traveling at a speed of 2 m/s
2 kg cart traveling at a speed of 3 m/s
3 kg cart traveling at a speed of 2 m/s
4 kg cart traveling at a speed of 1 m/s
All of the inertias are the same
A 300-newton girl standing on a dock exerts a force of 200 newtons on a 20,000-newton sailboat as she pushes it away from the dock. How much force does the sailboat exert on the girl?
300 N
20,000 N
200 N
50 N
A space shuttle accelerates, by speeding up, in outer space. It runs out of fuel, thus stopping the engines. The shuttle will
continue to accelerate for a short time, then slows down to a constant velocity
maintain it's current speed for a short time, then slow down and eventually stop
no long accelerate, and continue to move with constant velocity
stop immediately
Someone quickly pulls a tablecloth off of a set table and the plates, glasses, and silverware stay in place because of their
inertia
shape
centripetal acceleration
density
Accelerations are produced by
balanced forces
net forces
masses
none of these
How does acceleration of an object change in relation to its mass?
it is directly proportional
acceleration doesn't depend on mass
it is inversely proportional
it is inverse-square
The acceleration produced by a net force on an object is
directly proportional to the magnitude of the net force
in the same direction as the net force
inversely proportional to the mass of the object
all of the above
Whenever an object exerts a force on another object, the second object exerts a force of the same magnitude, but in the opposite direction to that of the first object. This is
always true
sometimes true
always false
An archer shoots an arrow. Consider the action force to be the bow string against the arrow. The reaction to this force is the
weight of the arrow
air resistance against the bow
friction of the ground against the archer's feet
arrow's push against the bowstring
grip of the archer's hand on the bow
A player catches a ball. Consider the action force to be the impact of the ball against the player's glove. What is the reaction to this force?
The player's grip on the glove
The force the glove exerts on the ball
Friction of the ground against the player's shoes
The muscular effort in the player's arms
Which diagram best represents a dresser being pushed to the right across a carpet floor?
a
b
c
d
Which diagram represents an object moving to the right at a constant velocity?
a
b
c
d
a or c
If the momentum of an object changes and its mass remains constant,
its velocity is changing
it is accelerating (or decelerating)
there is a force acting on it
all of the above
Which of the following is not a contact force?
Friction
Gravity
Normal
Applied
