Answer to Question #247395 in Physics for Valle

Question

A book on top of a table. A rightward force is applied to a book to move it across a desk at a constant velocity. Consider frictional forces. Neglect air resistance.

1. Draw the free body diagrams of the forces acting on each item above.

2. Identify the forces acting on the object in each item.

3. Identify whether the net force is a balance or not balance.

Answer 1

The green force is the force that pushes the book, the red force is the force of friction, the orange is the force of gravity, the purple is the normal force.

The net force is a balance because, according to Newton's second law, the object can only move at a constant velocity of all forces are balanced and the net force is zero.