If it uses 5 watts, how much time would it take to do 100j of work?

If you held a stone over the mouth of a well and then let it go , what would happen to the stone? explain your answer.

The momentum of a man riding his bicycle downhill can be calculated. the bicycle and the man have a combined mass of 40 kg. the velocity of the bicycle is 10 m/s. calculate the momentum.

Which statement is an example of the law of conservation of energy? a soccer ball eventually stops because its energy disappears. when a light bulb is turned on, electrical energy is converted to light and heat. an automobile engine burns gasoline to converts its chemical energy to electrical energy.