Newton's First and Third Laws Answers

Which statements describe an object in motion that has no external force acting on it? Check all that apply.

John pushes Hector on a plastic toboggan.The free-body diagram is shown.

Which object is in static equilibrium?

Which best describes the forces identified by Newton’s third law of motion?

A box is sitting on the floor. The box was then pulled with a force, Ft. The box did not move. The free-body diagram of the box is shown.

Lien is pushing a box across a table. She used a force of 100 N to get the box moving. Which force did she overcome to get the box moving?

Which situation is contrary to Newton’s first law of motion?

In deep space, there is very little friction. Once they launch a probe into deep space, where there are no external forces acting on it, scientists shut the probe’s engines off because the scientists want the probe to

Which is an action/reaction force pair? Check all that apply.

Kamala puts on inline skates and stands facing a wall. When she pushes against the wall, she rolls backward.Why does pushing harder make her roll faster?

A ball strikes a wall. It exerts a force of 10 N to the left against the wall and bounces off. What force does the wall exert on the ball?