Newton's 3rd Law of Motion

Newton's 3rd Law of Motion

Multiple Choice

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

• False

• True

Multiple Choice

How is this an example of Newton's 3rd Law?

• Only his head is pushing on the ball

• Only the ball is pushing on his head

• Both the ball and the head are exerting equal force on each other

Multiple Choice

The Law of Conservation of Momentum states:

• The total momentum before a collision is equal to the total momentum after a collision.

• The total momentum before a collision is greater than the total momentum after a collision.

• The total momentum before a collision is less than the total momentum after a collision.

• The total momentum before a collision is not related to the total momentum after a collision.

Multiple Choice

Which has more momentum: a car stopped at a red light or a bike moving at 15 mph?

• car
• bike
• they are equal
• cannot determine using the info provided

Multiple Choice

Two skaters begin at rest. Skater 1 has a smaller mass than Skater 2. After they push off each other,...

• Skater 1 experiences a greater change in momentum
• Skater 2 experiences a greater change in momentum
• Skater 1 has a greater velocity than Skater 2
• Skater 1 experiences a greater force

Multiple Choice

Which of the 0.5kg spheres in the image experiences the greater change in velocity?

• Black

• White

• Same

• Not Enough Info

Multiple Choice

Which of the 0.5kg spheres in the image experiences the greater force?

• Black

• White

• Same

• Not Enough Info

Multiple Select

Pick all of the scenarios below that are collisions.

• A catcher catches a baseball.

• A pitcher throws a baseball.

• Two cars smash into each other.

• Two students on roller skates push away from each other.

• A bug smashes into a windshield.

Multiple Choice

If two objects collide or explode, they experience

• the same force for the same amount of time.

• different forces for the same amount of time.

• different forces for different amounts of time.

• the same force for different amounts of time.

Multiple Choice

According to Newton's Laws, for every action there is an ....

• equal and opposite reaction.

• equal and parallel reaction.

• unequal and opposite reaction.

• unequal and unrelated reaction.

Multiple Choice

The Law of Conservation of Momentum states:

• The total momentum before a collision is equal to the total momentum after a collision.

• The total momentum before a collision is greater than the total momentum after a collision.

• The total momentum before a collision is less than the total momentum after a collision.

• The total momentum before a collision is not related to the total momentum after a collision.

Multiple Choice

If a person pushes down on a trampoline, why do they move back up into the air?

• The trampoline pushes back with a greater force than the person

• The trampoline pushes back with less force than the person

• The trampoline pushes back with an equal and opposite force as the person

Multiple Choice

If the person is pushing backwards with the paddle, why do they move forward?

• The person will actually move backwards, they need to paddle the other way

• The water pushes back with an equal and opposite force

• The person is pushing harder than the water

• The water pushes back with a greater force than the person

Multiple Choice

The two paired forces in Newton's third law:

• act on different objects

• are equal in size

• are opposite in direction

• are the same type

• all of the above

Multiple Choice

What happens to the balloon if the air is released ?

• Balloon goes right

• Balloon goes up

• Balloon goes down

• Balloon goes left

Multiple Choice

What will happen if the Action is greater than the Reaction?

• The man will fall

• The boat will sink

• Nothing will happen

Multiple Choice

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

• Newton 2nd law of motion

• Newton 3rd law of motion

• Newton 1st law of motion

• I don't know

Multiple Choice

Why is the net force 0 in the image?

• Because the elephants are the same size
• Because they are both pulling the same amount of force in opposite directions
• Because they are elephants
• Because they are pulling away from each other.

Multiple Choice

If a 10 kilogram object accelerates suddenly at 15 m/s², how much force was applied to the object?

• 150 Newtons
• 15 Newtons
• 150 kilograms
• 100 kilograms

Multiple Choice

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?

• For every action there is an equal and opposite reaction.
• Every mass exerts a force on every other mass.
• An object at rest tends to stay at rest.
• Friction opposes the motion of an object.

Multiple Choice

The forces in a force pair are in _______ direction

• opposite

• same

Multiple Choice

When a heavy football player and a light one run into each other, who exerts more force

• The light one

• Their force are equal

• The heavy one

Multiple Choice

Force always come in________

• waves

• triplets

• pairs

Multiple Choice

When the person pushes the ground with their foot, the equal and opposite reaction force is

• the ground pushing back on their foot

• when they start to move forward

Multiple Choice

If two people with the same mass collide, they experience the same amount of force.

• True

• False

Multiple Choice

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

• Only the ball is using the head

• They are both exerting an equal force on each other

• Only the head is pushing the ball

Multiple Choice

Action reaction forces never cancel each other out because

• They act on different objects.

• They act on the same objects

• They do not act on objects.

Multiple Choice

When a cannon fires a cannonball we observe Newton's third law. Which is the reaction force?

• The cannon moving forward

• The cannon moving backwards

• The cannonball moving backwards

• The cannonball moving forward

Multiple Choice

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

• False

• True

Multiple Choice

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

• unequal and opposite

• equal and similar

• stronger and opposite

• equal and opposite

Multiple Choice

What law of motion does this picture represent?

• Newtons 1st law
• Newtons 4th law 
• Newtons 3rd law 
• Newtons 2nd law

Multiple Choice

Which law best explains why more force must be applied to the bowling ball to make it accelerate at the same rate as the tennis ball.

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

Multiple Choice

You are carrying a lunch tray when you bump into the edge of a table. Although the tray did not tip, your milk falls off of the front of the tray.

• Newton's

  1st

  Law of Motion

• Newton's

  2nd

  Law of Motion

• Newton's

  3rd

  Law of Motion

Multiple Choice

You push against a wall and the wall is pushing back on you.

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

Multiple Choice

The harder you hit a baseball, the faster it accelerates.

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

Multiple Choice

A skater pushes another skater forward, but the one pushing moves backwards.

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

Multiple Choice

When the force on a car is doubled, the acceleration is doubled.

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

Multiple Choice

An empty truck and a fully loaded truck are next to each other at a traffic light. When the light turns green, the lighter truck increases speed more quickly. Which law best explains this situation?

• Newton's first law
• Newton's second law
• Newton's third law
• Conservation of momentum

Multiple Choice

An object will not have any inertia if it is _?

• accelerating
• moving in a circle
• in space
• all objects have inertia

Multiple Choice

Which law explains why a person in a car slides to the right when going through a very sharp left turn on the highway. 

• 1st Law
• 2nd Law
• 3rd Law

Multiple Choice

If an object is at rest (not moving) the forces acting upon it are _____________

• unbalanced
• weak
• balanced
• Hulk Smash!

Multiple Choice

What is Newton's Third Law?

• Object in motion stays in motion and an object at rest stays at rest unless acted on by a outside force
• Force = mass x acceleration
• For every action there is an equal and opposite reaction

Multiple Choice

You hit a wall with a stick.  The equal but opposite reaction is _____

• the wall pushes against you
• the stick pushes against you
• you push against the stick
• the wall pushes against the stick

Multiple Choice

This person bought coffee and put it on the seat next to them. If they stopped quickly and the coffee spilled which law would that represent?

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law

Multiple Choice

A student leaves a pencil on a desk and the pencil stays in the same spot until another student picks it up.

• Law of Inertia
• Law of Acceleration
• Law of Conservation of Momentum

Multiple Choice

Pushing a child on a swing is easier than pushing an adult on the same swing, because the adult has more mass and requires more force to accelerate.

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law

Multiple Choice

A person not paying attention while skateboarding hits a rock. The skateboard stops...they don't.

• The Law of Inertia
• The Law of Acceleration
• The Law of Conservation of Momentum

Multiple Choice

A magician pulls a tablecloth out from under dishes and glasses on a table without disturbing them.

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law

Multiple Choice

When all the forces on an object are equal and opposite, & the net force is zero, that's...

• balanced forces
• unbalanced forces
• terminal velocity
• reaction forces

Multiple Choice

The force that opposes motion between two surfaces in contact with each other.

• inertia
• friction
• momentum
• gravity

Multiple Choice

Any push or pull on an object.

• force
• velocity 
• inertia
• momentum

Multiple Choice

The tendency of an object to resist changes in its motion is...

• inertia
• force
• acceleration
• velocity

Multiple Choice

"An object in motion (or at rest) will to stay in motion (or at rest) until an outside force acts upon it."

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• Newton's 4th Law

Multiple Choice

Force = Mass x Acceleration

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• Newton's 4th Law

Multiple Choice

"For every action, there is an equal and opposite reaction."

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• Newton's 4th Law