Q. Two bodies, A (of mass 1 kg) and B (of mass 3 kg) are dropped from heights of 16 m and 25 m, respectively. The ratio of the time taken by them to reach the ground is :
A) 5/4
B) 8/5
C) 5/8
D) 4/5
Explanation
[Solution from source] In free fall from rest, h = ½gt², so t = √(2h/g) and does not depend on mass. t_A/t_B = √(16/25) = 4/5. Inverting the ratio or including the masses gives the wrong options. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.