A ball is dropped from a height of 80 m on a floor. At each collision, the ball loses half of its speed. Plot the speed-time graph and velocity-time graph of its motion till two collisions With the floor. [Take `g=10 m//s^2`]

Answer

A, C, D

Explanation

Speed first increases. Then just after collision, it
beocmes half and now it decreases.
Pattern of velocity is same (with sign). In the
answer, downward direction is taken as positive.
Further. `v=gt`
Hence, v-t graph is straight line.