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Newton's 3rd Law

Total questions: 15

Worksheet time: 14mins

Name
Class
Date
1.

Newton’s law states that for every action, there is an ________ reaction.

a)

unequal and opposite

b)

equal and similar

c)

stronger and opposite

d)

equal and opposite

2.

When a small car pushes a big truck, the truck applies an equal and opposite force on the car.

a)

False

b)

True

3.

How is this an example of Newton’s Third law?

a)

Only the ball is using the head

b)

They are both exerting an equal force on each other

c)

Only the head is pushing the ball

4.

Force always come in________

a)

waves

b)

triplets

c)

pairs

5.
A person steps out of the boat and onto the dock.  As the person moves forward onto the dock, the boat moves backward.  Which statement best describes the backward motion of the boat as the person steps forward?
a)
For every action there is an equal and opposite reaction.
b)
Every mass exerts a force on every other mass.
c)
An object at rest tends to stay at rest.
d)
Friction opposes the motion of an object.
6.

A book pushes down on a table with a force of 5N, the table..

a)

Pushes back with a force of 5N

b)

Pushes back with a force less than 5N

c)

Pushes back with a forcec greater than 5N

d)

Does nothing. A table has no force.

7.

According to Newton’s Third Law, when you lean on a wall, which force is greater?

a)

Wall's foce

b)

Your force

c)

Wall's friction

d)

They are equal

8.

When a cannon fires a cannonball we observe the action of the cannonball pushing forwards off of the cannon. Which is the reaction force?

a)

The cannon pushing up on the ground

b)

The cannon pushing backwards off of the cannonball

c)

The cannonball pulling backwards

d)

The cannonball falling forward

9.

This picture shows .............

a)

Newton 2nd law of motion

b)

Newton 3rd law of motion

c)

Newton 1st law of motion

d)

I don't know

10.
What is the reaction force to a foot pushing down on the floor?
a)
The foot going through the floor
b)
The floor pushing back against the foot
c)
The floor breaking to the foot
11.

What happens when two objects, such as a baseball and a bat, collide?

a)

They hit each other with the same force in the same direction.

b)

They hit each other with the same force in opposite directions.

c)

They hit each other with unequal force in opposite directions.

d)

One remains still while the other one moves in the same direction.

12.
Which best explains why we are able to accelerate forward when starting to run?
a)
As one leg moves backward, it provides an equal and opposite force for the other foot to move forward.
b)
No acceleration takes place. Runners are always at a fixed velocity.
c)
The striking foot pushes backward against the ground. The friction with the ground provides an equal and opposite force forward.
d)
The runner's upper body quickly leans forward, causing the entire body to begin accelerating forward
13.
Who was the scientist who gave us the Laws of Motion?
a)
Sir Isaac Newton
b)
Albert Einstein
c)
Galileo Galilei
d)
Aristotle
14.

An astronaut way out in space is considered to be “weightless" This is because–

a)

his mass is so small relative to the earth that gravity doesn't affect him.

b)

gravitational force decreases greatly over long distances.

c)

gravitational force pushes objects away from each other at long distances.

d)

objects far away from the earth have less mass.

15.

The force between two masses

a)

Gravitational force

b)

Force

c)

Mass

d)

Interacting objects