Newton's Second Law — Unit test Answers

The forces acting on a child sitting in a seat are described by the free-body diagram shown.

According to Newton’s second law of motion, the acceleration of an object is inversely proportional to which quantity?

Jerome places a bag of flour on a scale. The scale shows that the bag has a weight of 17 N. Which is the reaction force of the bag sitting on the scale?

An object has a mass of 15 kg and is accelerating to the right at 16.3 m/s2. The free-body diagram shows the horizontal forces acting on the object.

An object with a mass of 20 kg has a net force of 80 N acting on it. What is the acceleration of the object?

An elevator has a weight of 14,700 N and has an acceleration of –0.30 m/s2. The free-body diagram shows the forces acting on the elevator.

Which is an action that can cause an object to move or change its state of motion?

The free-body diagram of a crate is shown.

A push broom is being pushed down across a rough floor. The broom moves to the right.What is the correct free body diagram of the broom?

Two objects are interacting, but stay stationary. Which best describes what is happening to the action and reaction forces?

A box is pulled up a rough ramp that makes an angle of 22 degrees with the horizontal surface. The surface of the ramp is the x-plane.

A box is being pulled by two ropes. Eduardo pulls to the left with a force of 500 N, and Clara pulls to the right with a force of 200 N. The box moves because of the two forces applied to it. Leon records the forces and direction of the forces acting on the box in his lab notebook.