Q

If work done is zero, what is the angle between a nonzero force and nonzero displacement?

RRB Group D; RRB Group D 08/10/2018 / Shift-II; 17/09/2018 / Shift-II 2018
✓ Answer: B 90°
W = Fs cos θ = 0 implies cos θ = 0, so θ = 90°.
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