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PHY 101 PHY 101 Past Questions Objective Question

Question

Two bodies of different masses m and m are dropped from two different heights a and b. The ratio of the times taken by the two to drop through these distances is:
Options
A a : b
B b : a
C a² : b²
D √a : √b
Correct Answer
Correct Answer

Option D is the correct answer.

Detailed Explanation

For a body dropped from rest, the time of fall t is related to height h by h = ½gt², so t = √(2h/g). Therefore, t is proportional to the square root of h. The ratio of times t₁ : t₂ = √a : √b. The masses are irrelevant as they cancel out.

Hint

Use the equation of motion for free fall from rest: h = ½gt².

Question Info