A block sliding along a friction including plane as shown in figure (take g =10 m/sec2). square find the work done by the normal force when block reaches bottom ?
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N = normal force on the block due to surface of the incline
d = displacement of the block parallel to incline
θ = angle between normal force and displacement of the block = 90
we know that , work done by a force is given as
W = F x Cosθ
where W = work done , F = force , x = displacement , θ = angle between force and displacement
hence work done on the block by the normal force is given as
W = N d Cos90
Since Cos90 = 0
hence
W = N d (0)
W = 0 J
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