Newton's 3rd Law (8th)

A baseball bat hits a baseball with a force of 100 Newtons. What is the force and its direction exerted by the ball on the bat?

• 100 Newtons, same direction

• 100 Newtons, opposite direction

• 200 Newtons, opposite direction

• 200 Newtons, same direction

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

• False

• True

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

• unequal and opposite

• equal and similar

• stronger and opposite

• equal and opposite

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

Which object has no acceleration?

• A stapler on a table.

• A car moving at a constant speed in one direction.

• A satellite orbiting Earth.

• A bike turning a corner.

A semi truck and a Volkswagen (small car) traveling at the same speed have a head on collision. Which statement is correct?

• The impact force is greater on the Volkswagen.

• The impact force is greater on the semi truck.

• The impact force is less on the semi truck.

• The impact force is equal for both.

Two objects are acted on by the same unbalanced force. Object 1 accelerates two times faster than object 2. What can you determine about the mass of objects 1 and 2?

• Object 1 has slightly less mass than object 2.

• Both 1 and 2 have the same mass.

• Object 2 has about two times more mass than object 1.

• Object 1 has about 2 times more mass than object 2.

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

Force always come in________

• waves

• triplets

• pairs

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.