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Practice question

MCQ

Question

A 5kg block at 10m/s encounters a force F\=−2xN from x\=0.8m to x\=4m. What is the final speed?

Options

Choose one · Correct answer highlighted

Explanation

Initial K=12×5×102=250J. 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 250 J as the result, so option A is correct.

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