Question

A free body diagram with 4 force vectors. The first vector is pointing downward labeled F Subscript g Baseline, the second is pointing right labeled F Subscript p Baseline. The third is pointing upward labeled F Subscript N Baseline. The fourth is pointing left labeled F Subscript f. The upward vector is equal in length to the downward vector. The right vector is longer than the left.
Which statements describe the book and the forces acting on it? Check all that apply.

The forces are balanced.
The forces are unbalanced.
The net force is zero.
The book is at rest.
The net force is to the right.
The book is moving to the right.

Answer 1

Correct choices:
- The forces are unbalanced.
- The net force is to the right.

Reason: The upward and downward forces are equal so vertical forces balance, but the rightward force is larger than the leftward friction so there is a net force to the right. That means the forces overall are unbalanced (net force ≠ 0). You cannot conclude the book is at rest; with a net rightward force it will accelerate to the right (so "moving to the right" is not necessarily true at the instant shown unless additional information is given).