A man of mass 62 kg sums up a stair case of 65 steps in 12 seconds. if the height of each step is 20 cm .find power.g=10 m/s^2
Answers
Answered by
65
Total length of steps = 65×20= 1300 cm
velocity = distance/time
=13/12
force = mg
=62 × 10. ( g = 10)
= 620
power = force × velocity.
= 620 × 13/12
= 671.6 watt.
velocity = distance/time
=13/12
force = mg
=62 × 10. ( g = 10)
= 620
power = force × velocity.
= 620 × 13/12
= 671.6 watt.
Answered by
1
"671.7W" is the correct answer
Given:
A man of mass = 62Kg
number of steps = 65
time = 12 sec
height of each step = 20 cm
g = 10 m/s²
Explanation:
Total height gain:
=20cm x 65 steps = 1300 cm
=13 meters
Work done by man = m x g x h
power = Work done by man/ time taken
= m x g x h/t
= 62 x 10 x 13 / 12
= 671.7W
hence, power spent by the man is 671.7W
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