Question

A body does 20 joule of work in 5 seconds. what is its power?

Answer 1

power is rate of doing work so power =work done /time
so p =20/5
p =4joule/s

Answer 2

Solutions:

Power = Work done/Time taken

Here, Work done = 20 J

And, Time taken = 5 s

So, putting these values in the above formula, we get;

Power = 20 J/5 s

Power = 4 J/s or 4 W