A ball of mass 150,g starts moving with an acceleration of 20m/{s^2} . When hit by a force, which ac

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4-1.Newton's Laws of Motion

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A ball of mass $150\,g$ starts moving with an acceleration of $20m/{s^2}$. When hit by a force, which acts on it for $0.1\, sec$. The impulsive force is ........ $N-s$

A

$0.5 $

B

$0.1 $

C

$0.3$

D

$1.2$

Solution

(c) Impulse $=$ Force $×$ time = $ m \times a \times t = 0.15 \times 20 \times 0.1 = 0.3\,N{\rm{ – }}s$

Standard 11

Physics

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