Question

a light bulb does 100 joules of work in 2.5 seconds how much power does it have

Answer 1

4 just divide 100 to 25 which is 4

Answer 2

Answer: 40Watt

Explanation: Power is the amount of work done in one seconds. Also know as 1Watt.

Therefore, if the light bulb consume an energy of 100joule in 2.5 secs. It means that the energy which is equal to work done in 1secs would be,

100/2.5=40 joules in one second which is the Power. Which can also be written in the standard unit of power {Watt} as 40Watt.