A small ball is projected horizontally with speed from the edge of a vertical cliff high
PHYSICS · Multi-part · CBSE · Physics · Motion in a Plane · Motion in a Plane
Problem
A small ball is projected horizontally with speed 20m s−1 from the edge of a vertical cliff 19.6m high. At the same instant, an identical ball is released from rest from the same point.
Neglect air resistance and take g=9.8m s−2.
(i) Calculate the time taken by each ball to reach the ground.
(ii) Determine the horizontal distance travelled by the projected ball during this time.
(iii) Find the magnitude of the velocity of the projected ball just before it strikes the ground.