Question
Physics Question on Motion in a straight line
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?
A
Body with smaller mass reaches first
B
Body with greater mass reaches first
C
Both of them reach simultaneously
D
None of these
Answer
Body with smaller mass reaches first
Explanation
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