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A body weighing $5 kg$ moves with velocity of $10 m / s$ and stops after $2 s$ . Final momenta of the body will be

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15 kg m / s

50 kg m / s

45 kg m / s

0

answer is D.

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Detailed Solution

A body weighing

5 kg

moves with velocity of

10 m / s

and stops after

2 s

. Final momenta of the body will be

0 .

Given that,
Mass of the body

(m) = 5 kg

Initial velocity

(u) = 10 m / s

Final velocity

(v) = 0 m / s

(because car stops)
Time take

(t) = 2 s

From the relation of momentum, mass and velocity
Momentum = mass × velocity
Final momentum

= 5 \times 0

= 0 kg m / s

As final velocity is 0.

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