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Two bodies of different masses are dropped simultaneously from the top of a tower. If air resistance is proportional to the mass of the body,

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a
the heavier body reaches the ground earlier
b
the lighter body reaches the ground earlier
c
both reach the ground simultaneously
d
cannot be decided

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detailed solution

Correct option is C

Air resistance is proportional to mass of the body

a=mg-fairm=mg-m=g-α

This acceleration is independent of mass and hence same time will be required.

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