Question

A ball is in free fall. Upward is taken to be the positive direction. The displacement of the ball during a short time interval is: ( )

Answer 1

Displacement of the ball with zero initial velocity is: $s = \dfrac{gt^2}{2}$ .

 During a short time interval $\Delta t$ displacement is: $\Delta s = gt\Delta t$ .

Answer. $\Delta s = gt\Delta t$