Physics

To find out how high does the ball go,
We can use the kinematic equation Vf² = Vi² + 2ad

Where,
Vf (final velocity) = 0m/s (At the highest point, the final velocity is 0 m/s. )
Vi (initial velocity) = 20m/s (since the pebble was dropped from rest)
a (acceleration) = -9.8m/s² （negative sign because it indicates dec...