Question

a man whose mass is 55kg climbs to height of 40m in 40 seconds. find the power consumed by man.​

Answer 1

To Find :-

• The power consumed by a man

Solution :

Given that,

• Mass of a man = 55kg
• The man climbed to height in 40 seconds = 40m

∴ The Workdone by the man :-

We know,

• Work done = Potential energy [ mgh ],

Where,

• m = Mass
• g = acceleration due to gravity
• h = Height

⇒ mgh

⇒ 55 × 40 × 9.8

⇒ 21560 J

The workdone of the man is 21560J.

Now, Power :-

We know,

• Power = W/t,

Where,

• W = Workdone
• t = Time

Therefore,

⇒W/t

⇒ 21560/40

⇒ 2156/4

⇒ 539 W

Required Answer :-

• The power consumed by a man is 539W.