Q

A 1000 kg car travelling at 72 km/h stops in 4 s after braking. Find the magnitude of the braking force.

RRB Group D 27/11/2018 / Shift-I 2018
✓ Answer: D 5.0 × 10³ N
72 km/h = 20 m/s. The deceleration magnitude is 20/4 = 5 m/s², so F = 1000 × 5 = 5000 N.
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