A man of weight 50 kg carries an object to a height of 20m in a time of 10 sec. The power used by the man in this process is 2000W, then find the weight of the object carried by the man [assume `g = 10 ms^(-2)`]

Options

A. 100 kg
B. 25 kg
C. 50 kg
D. 10 kg

Answer

C

Explanation

The power used by man, P=(M+m)gh/t
where, M=mass of man, m=mass of object, t=time, and h=height
`Rightarrow2000=((50+m)xx10xx20)/(10)Rightarrow100=50+x`
`Rightarrowx=100-50Rightarrowx=50kg`