Newton's Second Law Answers

A car is moving east along a straight, level road at a constant velocity. Which forces form an action/reaction force pair?

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.

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?

Which object is in static equilibrium?

Which best describes the forces identified by Newton’s third 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 situation is contrary to Newton’s first law of motion?

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

Juan draws a free-body diagram of an object that is in dynamic equilibrium moving to the left.

Keisha writes that if an object has any external forces acting on it, then the object can be in dynamic equilibrium but not static equilibrium.Which statement best describes Keisha’s error?

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?

Which is an action/reaction force pair? Check all that apply.Earth pulls on a book, and the book pushes against a shelf.A hockey stick hits a puck, and the puck pushes against the stick. A pencil pushes against a piece of paper, and the paper pushes against the desk.A finger pulls on a rubber band, and the rubber band pushes against the finger.A dog pulls on a leash, and the owner pulls back on the leash.