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Practice question

MCQ

Question

A 0.25kg ball moving at 18m/s at 53∘ to a wall rebounds at the same speed and angle. What is the impulse perpendicular to the wall? (Take sin⁡53∘\=0.8, cos⁡53∘\=0.6)

Options

Choose one · Correct answer highlighted

Explanation

Perpendicular component (x-axis) reverses 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 4 N s as the result, so option A is correct.

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