Question

. A man raises a box of mass 50 kg to a height
of 2 m in 20 s, while another man raises the same
box to the same height in 50 s.
(a) Compare : (i) the work done, and (ii) the power
developed by them.
(b) Calculate : (i) the work done, and (ii) the power
developed by each man. Take g = 10 N kg-1.
Ans. (a) (i) 1:1 (ii) 5:2,
(b) (i) 1000 J, 1000 J (ii) 50 W, 20 W​

Answer 1

Answer:

The work done by each person is,

W=50kg×10m/s

2

×2m

=1000 J

Power is equal to work done per unit time

Power of first person will be,

=

10sec

1000J

=100W

Power of second person will be

=

50sec

1000J

=20W

Step-by-step explanation:

mark me as brainliest