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Question

A car traveling at 54km/h comes to rest in 10s with uniform deceleration. What is the magnitude of the deceleration?

Options

Choose one · Correct answer highlighted

Explanation

Convert speed: 54km/h=54⋅10003600=15m/s. As per NCERT Chapter 3, equations v=u+at, s=ut+½at², v²=u²+2as describe uniformly accelerated motion. Applying correct signs and units gives 1.5 m/s² as the result, so option A is correct.