Question

Work done is 70%if angle between force and displacement is?

Answer 1

Gudnyt

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Here's ur answer

Work done = Force·Displacement

W = F·S = F*S*cosФ

Maximum work done = W = F*S*cos0 = F*S*1 = FS

W = FS

Since only 70% is done,

Work done = 70% of W = 70/100 * W

Hence,

70/100 W =  F*S*cosФ

70/100 W = W * cosФ

cosФ = 70/100 = 7/10

Ф = cos⁻¹(7/10)

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