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MHT CET 2026 (13 Apr, Shift 2) · Impulse & Momentum Conservation

Impulse & Momentum Conservation question from MHT CET 2026 (13 Apr, Shift 2)

Q2MHT CET 2026 · 13 APR · SHIFT 2Easy

Impulse & Momentum Conservation

$100$ balls each of mass $m$ moving with speed $v$ simultaneously strike a wall normally and reflected back with same speed, in time $t$ s. The total magnitude of force exerted by the balls on the wall is

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Answer: (b)

Momentum change per ball $= mv - (-mv) = 2mv$ .
Total change for 100 balls $= 200mv$ in time $t$ .
$F = \frac{\Delta p}{t} = \frac{200mv}{t}$
So the answer is (b) $200mv/t$ .

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