5. 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.
Answers
Answered by
8
Explanation:
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(ans)
Answered by
52
Answer:
The work done by each person is,
W=50kg×20m/s2×2m
=2000 J
Power is equal to work done per unit time
Power of first person will be,
=10sec2000J
=200W
Power of second person will be
=50sec2000J
=20W
Ans:-20W
Thank you :)
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