a boy of mass 40kg runs up a height of 60 step each 10cm high in 5 sec find the power developed by the boy.
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Given Data:
Mass of a boy = m = 40 kg
No. of steps = 60
Height of each step = h = 10 cm = 0.1 m
Total height = 60 x 0.1 = 6 m
Time = t = 5 sec
Work done = W = ?
Power = P = ?
Solution:
Work done = W = m g h
W = (40) (10) (6) (∵g = 10 m/s²)
W = 2400 J
Now,
Power = P = Work done/Time taken
P = W/t = 2400/5
P = 480 W
480 watt is the required answer.
Mass of a boy = m = 40 kg
No. of steps = 60
Height of each step = h = 10 cm = 0.1 m
Total height = 60 x 0.1 = 6 m
Time = t = 5 sec
Work done = W = ?
Power = P = ?
Solution:
Work done = W = m g h
W = (40) (10) (6) (∵g = 10 m/s²)
W = 2400 J
Now,
Power = P = Work done/Time taken
P = W/t = 2400/5
P = 480 W
480 watt is the required answer.
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Answer:
Write 60 on 50
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