Q. A ball $P$ is dropped vertically and another ball $Q$ is thrown horizontally with the same velocities from the same height and at the same time. If air resistance is neglected, then
A) Ball $P$ reaches the ground first
B) Ball $Q$ reaches the ground first
C) Both reach the ground at the same time
D) The respective masses of the two balls will decide the time
Explanation
(c) Vertical component of velocities of both the balls are same and equal to zero. So $t = \sqrt{\frac{2h}{g}}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.