Question

The power expended when a 10 N barbell is raised 2. 0 m in 2s is

Answer 1

Work done = (force) x (distance)
= (10 N) x (2 m) = 20 joules .

Power = (work done) / (time to do the work)
= (20 J) / (2 sec)
= 10 joules/sec = 10 watts .