RRB Group D 17-Sep-2018 Shift 1 Solved Paper

Question : 32 of 100

Marks: +1, -0

The angle between displacement and force applied when no work is done i s _______ .

Solution:

W=F d \cos θ

\{

Where

θ

is angle between force and displacement

\}

since

W=0 ⇒ F d \cos θ=0

⇒ \cos θ=0 ⇒ θ=90^{∘}

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