A man carries a load of 50 kg through a height of 40 m in 25 seconds . If the power of the man is 1568 W , his mass is:

Explanantion:

power=work done/ time

P.E=mgh

Where, P.E is the potential energy, M is mass, g is gravitational constant and h is height.

Mass of load = 50 kg

Height of carrying the load = 40 m

Time to carry the load = 25 seconds

Power of the man = 1568 W

We will use the formula of power to find the mass of the man

power=work done /time

P.E=Mgh

substitute the potential energy in place of work done power=Mgh/t

M=M_load+M_man

M=50+M_man

Now we will substitute the value of m

P =  Mgh/t

1568 =  ((50+M_man )×9.8×40)/20

Solving for mass of man

∴M_man=50 kg