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A particle is projected with velocity v0  along x-axis. A damping force is acting on the particle which is proportional to the square of the distance from the i.e. ma=ax2. The distance at which the particle stops: [Take m =1kg]

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a
2v023α12
b
3v022α12
c
2v0 3α13
d
3v022α13

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detailed solution

Correct option is D

Given : ma=−αx2⇒mvdvdx=−αx2⇒m∫v00 vdv=−α∫0x x2dx  ⇒m0-v022=-αx33-0⇒x=3mv022α13⇒x=3v022α13        [put m =1kg]


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