Question

A person of mass 100 kg reaches a height of 5 meters in 10 seconds. Find the power used by the person ( g
= 10m/s2)​

Answer 1

Answer:

Given: m=60kg

H=10m

T=5sec

Power=mgh/t

60×10×9.8/5

=1176 watt

Explanation:

Answer 2

Given,

Mass = 100 kg

Height, s = 5 m

Time = 10 sec

To find,

Power used by the person to reach 5 meter height

Solution,

The formula of power is given by

Power = work done x time taken. (I)

Work done is given as,

Work done = Force x displacement

W = mg x h

W = 100 x 10 x 5

W = 5000 J. (II)

Using (II) in ewuation (I)

Power = 5000 x 10

Power = 50,000 watt

Power = 50 kW

The power used by the person is 50 kW.