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Q.

A particle of mass ‘m’ is driven by a machine that delivers constant power ‘k’ watts. If the particle starts from rest the force on the particle at time ‘t’ is

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a

mkt−1/2

b

2mkt−1/2

c

mk2t−1/2

d

12mkt−1/2

answer is C.

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Detailed Solution

detailed_solution_thumbnail

p=wt⇒w=kt

12mv2−u2=kt

12mv2=kt

v=2kmt

a=dvdt=2km12t−1/2

F=ma=mk2t−1/2

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