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Practice question

MCQ

Question

A 0.2kg ball moving at 30m/s at 45∘ to a wall rebounds at the same speed and angle. What is the impulse perpendicular to the wall? (Take sin⁡45∘\=cos⁡45∘\=0.707)

Options

Choose one · Correct answer highlighted

Explanation

Perpendicular component (x-axis) changes direction upon rebound. 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 6 N s as the result, so option A is correct.

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