Newton's Third Law of Motion

What does Newton's Third Law of Motion state?

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

• An object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

• The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

• Energy cannot be created or destroyed.

In a rocket launch, what is the action and reaction pair described by Newton's Third Law?

• The exhaust moving downward and the rocket moving upward.

• The rocket moving upward and gravity pulling it down.

• The rocket's weight and the launchpad's support.

• The fuel burning and the engine heating up.

If a boxer punches a punching bag with 50 pounds of force, how much force does the punching bag exert back on the boxer's fist?

• Less than 50 pounds of force.

• More than 50 pounds of force.

• Exactly 50 pounds of force.

• No force, as the bag is stationary.

What type of friction prevents a heavy piece of furniture from moving immediately when you first try to push it?

• Sliding friction.

• Rolling friction.

• Static friction.

• Fluid friction.