Question

A boy of mass 45kg ran over 50 steps of 15cm each in 15 seconds. Calculate the power he developed

Answer 1

Power = (Work done)/(Time taken)

Work done = (Mass x Gravity x Height)

Work done = (45 x 9.8 x 7.5)

Work done = 3315 Joules

Time taken = 15 seconds

Power = (3315)/(15)

Power = 221 Watts