Q

A force of 20 N displaces an object 2 m and does 20 J of work. Find the angle between force and displacement.

RRB ALP & Technician 20/08/2018 / Shift-II 2018
✓ Answer: A 60°
cos θ = W/(Fs) = 20/(20 × 2) = 1/2, so θ = 60°.
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