VG_Newton's 3rd Law of Motion Exit Ticket #2

Which of the following best describes Newton's Third Law of Motion?

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

• An object in motion stays in motion unless acted upon by an external force.

• Force equals mass times acceleration.

• Energy cannot be created or destroyed.

A swimmer pushes the water backward with her hands. What is the reaction force according to Newton's Third Law?

• The water pushes the swimmer forward.
• The swimmer's hands move backward.

• The water moves backward.

• The swimmer's feet push against the pool floor.

Explain why a rocket is able to move in space where there is no air to push against.

• The rocket's engines push against the vacuum of space.

• The rocket's engines expel gas, and the reaction force pushes the rocket upward

• The rocket uses magnetic forces to propel itself.

• The rocket is pulled by gravitational forces.

When you jump off a small boat into the water, the boat moves backward. Which of the following explains this phenomenon?

• The boat moves backward because of the wind.

• The boat moves backward due to the action-reaction force pair.

• The boat moves backward because it is lighter than you.

• The boat moves backward because of water currents.

Tags

NGSS.MS-PS2-1

A horse pulls a cart. Identify the action-reaction force pair in this scenario.

• The horse pulls the cart forward; the cart pulls the horse backward.

• The horse pushes the ground backward; the ground pushes the horse forward.

• The cart pushes the ground backward; the ground pushes the cart forward.

• The horse pulls the cart forward; the cart pushes the ground backward.

Tags

NGSS.MS-PS2-1

A balloon is released and flies around the room. Explain the forces at play.

• The air inside the balloon pushes out, and the reaction force pushes the balloon forward.

• The air outside the balloon pushes in, and the reaction force pushes the balloon backward.

• The balloon pushes the air forward, and the reaction force pushes the balloon downward.

• The balloon pushes the air backward, and the reaction force pushes the balloon upward.