Question

consider this situation: a book is sliding to a stop while moving across the classroom floor. of the forces listed, identify which act upon the book. tap to select the forces that are present. normal gravity applied friction tension air resistance

Explanation:

Step1: Analyze vertical forces

The book is on the floor, so there is a gravitational force $F_g = mg$ pulling it downwards and a normal force $N$ exerted by the floor upwards to balance the vertical - component of forces.

Step2: Analyze horizontal forces

Since the book is sliding to a stop, there is a frictional force $f$ acting in the opposite direction of its motion. There is no applied force mentioned as it is just sliding to a stop on its own, no tension as there is no string - like object attached, and air resistance is usually negligible in a classroom situation for a sliding book.

Answer:

Normal, Gravity, Friction