Introduction to Forces Answers

A ball is dropped from the top of a building. It initially moves at 4.0 m/s. After 0.5 seconds, it moves at 3.8 m/s.

What is the purpose of a free body diagram?

A book is sitting on a desk. What best describes the normal force acting on the book?

A box experiencing a gravitational force of 600 N is being pulled to the right with force of 250 N. A 25 N frictional force acts on the box as it moves to the right.

A box is pulled to the right with a force of 65 N at an angle of 58 degrees to the horizontal. The surface is frictionless. The free body diagram is shown.

A box is at rest on a ramp at an incline of 22°. The normal force on the box is 538 N.

A box is being pulled to the right. The free body diagram is shown.

A ball is dropped from rest from the top of a building. What force is responsible for the downward motion of the ball?

A box at rest is in a state of equilibrium half way up on a ramp. The ramp has an incline of 42° . What is the force of static friction acting on the box if box has a gravitational force of 112.1 N ?