Q

Starting from rest, Sunil's car reaches 20 m/s in 10 s. Find its acceleration.

RRB Group D 10/10/2018 / Shift-II 2018
✓ Answer: B 2 m/s²
a = (20 − 0)/10 = +2 m/s². The source solution reverses the subtraction and incorrectly calls it retardation.
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