Question

a man of mass of 60 kg climbs a height of 10 m in 5 seconds calculate the power of the man( g= 9.8 metre per second square)

Answer 1

Given: m=60kg

H=10m

T=5sec

Power=mgh/t

60×10×9.8/5

=1176 watt

Answer 2

Given :

Mass (m) = 60 Kg

Height (H) = 10 m

Time (T) = 5 seconds

To Find :

Power of the man

Solution :

Work done in unit time is called power.

Power = $\frac{Work Done (W)}{Time (T)}$

Work Done (W) = Force × Displacement

                         = Mass × Acceleration due to gravity × Displacement

                         = 60 × 9.8 × 10

                         = 5880 J

∴ Power of the man (P) = $\frac{Work Done (W)}{Time (T)}$

                                      = $\frac{5880}{5}$

                                      = 1176 W

Therefore, the power of the man is 1176 W.