A stone is projected from the top of a cliff that is above the horizontal ground with…
PHYSICS · Multi-part · CBSE · Physics · Motion in a Plane · Motion in a Plane
Problem
A stone is projected from the top of a cliff that is 15m above the horizontal ground with a speed of 20ms−1 making an angle of 60∘ above the horizontal. Take g=9.8ms−2.
(i) Calculate the time taken by the stone to reach a point that is 10m above the level of projection.
(ii) For the earlier of the two possible times obtained in part (i), determine the speed of the stone and the angle that its velocity makes with the horizontal at that instant.