The velocity of a body of mass 20 kg increases to 400 kgm/s in 5s. If initial velocity was 10 m/s, what is the momentum before the force acts?

200 k g . m / s^{2}

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300 k g . m / s

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200 k g . m / s

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100 k g . m / s

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Solution

The correct option is B $200 k g . m / s$
Given : $m = 20$ kg
Initial velocity of the body $u = 10$ m/s
Thus initial momentum of the body $P_{i} = m u = 20 \times 10 = 200$ kg.m/s

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