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WorksheetsUnit 3 Motion and Forces Unit Review
Total questions: 20
Worksheet time: 39mins
Tom is learning about Newton's Laws of Motion. He and his classmates experienced four different activities, as described in the chart. Which activity illustrates Newton's Third Law of Motion?
j
K
L
M
The diagram shows a girl jumping on a trampoline. What causes the girl to move upward?
a reaction force
a gravitational force
inertia
mass
The diagram shows a firefighter operating a hose. The arrows show the forces acting on the hose. Which statement describes the situation in the diagram.
Since the firefighter is at rest, he does not move as he operates the hose.
the hose has very little friction, making it slide toward the firefighter
The firefighter's mass decreases the force of the water escaping from the hose.
The water escaping from the hose exerts and equal and opposite force on the hose.
Which one of Newton's Laws states, "A body at rest tends to remain at rest, and a body in motion tends to remain in motion, unless acted upon by an unbalanced force?"
Newton's First Law of Motion
Newton's Second Law of Motion
Newton's Third Law of Motion
Newton's Fourth Law of Motion
When a constant unbalanced force acts on an object in the direction of the motion, what initially happens to the object's speed?
it decreases
it increases
it decreases then increases
it remains the same
If the mass of a moving object could be halved, what would happen to the inertia of the object?
it would remain unchanged
it would be quadrupled
it would be halved
it would be doubled
What will happen to an object in motion with no unbalanced force acting on it?
It will continue to accelerate until it reaches the speed of light.
It will gradually slow down and come to a rest.
It will continue to move at a constant speed.
It will initially accelerate but gradually slow down until it comes to a rest.
a rocket's action is to push down on the ground with the force of its powerful engines, and the reaction is that the ground pushes the rocket upwards with an equal force. Which law best explains this event?
The Law of Universal Gravity
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
Which example illustrates inertia?
rock stopping after rolling down a hill
ball bouncing on a hard surface
drink spilling after car comes to a sudden stop
person standing after sitting in a chair
Jasmine is driving a car and has a mas of 60 kg. Laura is her passenger and has a mass of 90 kg. Jasmine suddenly brakes to avoid hitting a deer. Who experiences the greatest force due to the seat belt?
Jasmine. She has the least mass.
Laura. She has the greatest mass.
Laura. She has the greatest speed.
Jasmine. She has the least speed.
Lee pushes on a wall to stretch after a long run. He pushes on the wall with 20N of force, yet the wall does not move. Which term best describes the forces in the scenario.
unbalanced forces
gravitational forces
directional forces
balanced forces
If there is nothing in the path of a baseball thrown up toward the sky, what will happen to the ball?
Because of inertia, it will stay on its current path until an object stops it.
It will eventually use all of its energy and fall back to the ground
The force of gravity will act on the ball, causing it to fall back to the ground.
Wind and clouds will change it's direction, causing it to fall back to the ground.
Examine the diagram that shows two men pushing a car. How are the forces exerted by the men acting on the car?
as balanced forces with a net force of 5 N in opposite directions
as balanced forces with a net force of 105 N in the same direction
as unbalanced forces with a net force of 5 N in opposite directions
as unbalanced forces with a net force of 105 N in the same direction
A baseball player is able to swing with exactly the same amount of force every time. Which object would leave the bat with the greatest speed when struck by the player?
a 45 gram golf ball
a 145 gram baseball
a 540 gram croquet ball
an 8200 gram bowling ball
Which road would exert the least amount of friction on a car?
asphalt road
gravel road
icy road
sandy road
A student watches a basketball game. Which activity during the game illustrates Newton's third law?
holding a ball
bouncing a ball
shooting the ball in the hoop
passing the ball to another player
what relationship exists between mass and inertia?
As mass increases, inertia decreases
as mass increases, inertia increases
mass cancels the property of inertia
mass stabilized the property of inertia
Force is measured in units called Newtons. The greater the force, the more Newtons of force applied to an object. With that in mind, which situation will result in the object moving the fastest after being struck?
striking a 100 g object with 100 N of force
striking a 100 g object with 200 N of force
striking a 200 g object with 100 N of force
striking a 200 g object with 200 N of force
A student pushed a wall with 30 N of force, and the wall does not move. What force does the wall exert on the student?
0 N
less than 30 N
30 N
more than 30 N
The diagram shows the direction of motion of two balls of equal mass just before they collide. Which diagram shows the direction of the two balls after the collision?
