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Instantaneous Force and Impulse

Find the velo...

Question

Find the velocity of the body of mass $2 k g$ from the momentum-time graph at the end of $5$ seconds.

10 m / s

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15 m / s

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20 m / s

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30 m / s

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Solution

The correct option is B $15 m / s$
From the figure,
Momentum at the end of $5 s = 30 N s$
i.e $m v = 30 N s$
Hence, velocity of the body at $5 s$
$v = \frac{30}{2} = 15 m / s$

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Find the velocity of the body of mass 2 kg from the momentum-time graph at the end of 5 seconds.

The correct option is B 15 m/sFrom the figure, Momentum at the end of 5 s=30 Ns i.e mv=30 Ns Hence, velocity of the body at 5 s v=302=15 m/s

Find the velocity of the body of mass $2 k g$ from the momentum-time graph at the end of $5$ seconds.

The correct option is B $15 m / s$
From the figure,
Momentum at the end of $5 s = 30 N s$
i.e $m v = 30 N s$
Hence, velocity of the body at $5 s$
$v = \frac{30}{2} = 15 m / s$