49. A man pulls a lawn roller through a distance of 20 m with a force of 20
weight. If he applies the force at an angle of 60° with the ground, calcula
the power developed if he takes I min in doing so.
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t = 1min = 60sec
s = 20m
F = 20N
Theta = 60 degree
Therefore
Power = Work / t
= Fs * cos theta / t
= 20 * 20 * cos 60 / 60
= 400 * 0.5 / 60 ( cos 60 = 0.5 )
= 200 / 60
= 3.3 watt
( Please mark this answer as brainliest answer )
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s = 20m
F = 20N
Theta = 60 degree
Therefore
Power = Work / t
= Fs * cos theta / t
= 20 * 20 * cos 60 / 60
= 400 * 0.5 / 60 ( cos 60 = 0.5 )
= 200 / 60
= 3.3 watt
( Please mark this answer as brainliest answer )
____Welcome____
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