Question

a man of mass 70kg climbs a hill of height 900m in 30 minutes. Calculate power​

Answer 1

Answer: 450W

Explanation:

‘*’ means multiply

‘/‘ means divide

Solution,

Mass=90kg

Distance traveled=900m

Time taken=30 mins

=30*60 (1 minute = 60sec)

=1800

Now,

W=M*G*H

=90*10*900

=900*900

=810000J or, 810*10^3J

Then,

Power=W/T

=810000J/1800

=450.

Hence, The power of the man is 450 watt