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Q.

A particle of mass 0.2 kg is moving in one dimension under a force that delivers a constant power 0.5 W to the particle. If the initial speed (in m/s) of the particle is zero, the speed (in m/s) after 5 sec is 

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a

2

b

3

c

4

d

5

answer is D.

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Detailed Solution

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Power(P) X time (T)= Work done= change in KE

0.5×5=12×0.2 v2 v=5m/s

 

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