Question

A ball P is dropped vertically and another ball Q is thrown horizontally with the some velocity 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

The correct option is C

Both reach the ground at the same time

Vertical component of velocities of both the

balls are equal to zero. So both the balls have free fall along the vertical.

Therefore for both the balls $t=\sqrt{\frac{2h}{g}}$