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a-t Graph

A body of mas...

Question

A body of mass $5 k g$ is acted upon by a force $F$ which varies with time $t$ as shown in figure. The net momentum gained by the body in $10 s$ is

A

Zero

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B

100 N - s

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C

140 N - s

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D

200 N - s

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Solution

The correct option is B $140 N - s$
Given in momentum $=$ Impulse $=$ Area under
$F - t$ curve $= \frac{1}{2} \times (10 + 4) \times 20 = 140 N - s$

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