Newton's 3rd Law

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

• unequal and opposite

• equal and similar

• stronger and opposite

• equal and opposite

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

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.

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.

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

• The man will fall

• The boat will sink

• Nothing will happen

What happens to the balloon if the air is released ?

• Balloon goes right

• Balloon goes up

• Balloon goes down

• Balloon goes left

P represents

• mass

• power

• momentum

• force

In the equation p=mv, m represents

• mass

• meters

• milliseconds

• momentum

v represents

• volume

• velocity

• force

• acceleration

m/s is a unit for

• mass

• force

• acceleration

• velocity