Question

a book sits on a desk and exerts a downward force of 5n on the desk. what force does the desk exert on the book? (1 point)

5 n downwards

5 n upwards

9.8 n upwards

0 n

Explanation:

According to Newton's third law of motion, for every action, there is an equal and opposite reaction. The book exerts a downward force of 5N on the desk (action). So, the desk will exert an equal (5N) and opposite (upward) force on the book (reaction).

Answer:

5 N upwards