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Assertion: Two bodies of masses `M` and `m(M gt m)` are allowed to fall from the same height if the air resistance for each be the same then both the bodies will reach the earth simultaneously. Reason: For same air resistance, acceleration of both the bodies will be same.A. If both assertion and reason are ture and reason is a true explanation of assertion.B.C. If assertion is ture but reason is false.D. If both assertion and reason are false. |
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Answer» Correct Answer - D The force acting on the body of mass `M` is its weight `Mg` acting vertically upward. :. Acceleration of the body, `a=(Mg-F)/(M)=g-(F)/(M)` Now, `Mgtm` , therefore, the body with larger mass will have greater acceleration and it will reach the ground first. |
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