Q

A 1 kg object moves east at 2 m/s. A force of 1.5 N acts northward. Find the magnitude of its displacement after 2 s.

RRB Group D 23/10/2018 / Shift-I 2018
✓ Answer: A 7 m
The source selects A by adding perpendicular displacements, which is incorrect. Eastward displacement is 4 m and northward displacement is 3 m, so the magnitude is √(4² + 3²) = 5 m. The printed answer key is retained.
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