A man exerts 500 Newtons of force to move a piece of furniture 2 meters. If it takes him 4 seconds to move the furniture, how much power does it require?

Explanation:

Work = (force) x (distance)

The work he did:    Work = (500 N) x (2m)  =  1000 joules

The rate at which he did it (power):  

Work/time =  1,000J/4s

                  =  250 joules/sec

                  =  250 watts  

Therefore he used 250 watts of power to move the furniture

increase masses, decrease separation

talk back to him about the sport and show him your expertise or leave the room