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  4. Two bodies of different masses are dropped from a tower, assuming that air resistance is proportional to the mass of body. Which of the following is correct?

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Q. Two bodies of different masses are dropped from a tower, assuming that air resistance is proportional to the mass of body. Which of the following is correct?

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Solution:

Air resistance is more for the bigger mass (given). Therefore the retardation due to air resistance is more for the bigger mass. Therefore the smaller mass reaches first. Although g, the acceleration is the same for both, retardation due to air-resistance is less for the smaller mass