Question

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

Answer 1

Answer: (C)

Both reach the ground at the same time

Answer 2

Vertical component of velocities of both the balls are same and equal to zero. So $t = \sqrt{\frac{2h}{g}}$