A girl is carring a school bag of 3kg mass on her back and moves 200m on a levelled road. The work done against the gravitational force will be? (g=10ms-2
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No work is done against gravitational force. She is moving horizontally on a straight road. There is no vertical displacement.
Mathematically..,
W = FS Cosθ
= FS Cos90
= 0 ……[∵ Cos90 = 0]
Mathematically..,
W = FS Cosθ
= FS Cos90
= 0 ……[∵ Cos90 = 0]
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