Question

A man who weighs 800 N stands on a chair. In order for the chair to support the man, the chair must exert an upward force of...

1) less than 800 N
2) 800 N
3) More than 800 N

Answer 1

The chair must exert an upward force of 800 N to support the man, which is equal to the man's weight, in accordance with Newton's third law of motion.

Step-by-step explanation:

To support a man who weighs 800 N, the chair must exert an upward force that is equal to the man's weight. According to Newton's third law of motion, for every action, there is an equal and opposite reaction. Therefore, the chair needs to exert an upward force of 800 N to support the man and keep him in static equilibrium, where all the forces are balanced.