Question : A ball is projected upwards with a velocity v. It comes back to ground in time t. Which v-t graph shows the motion correctly?
Doubt by Vansh
Solution :
When the ball is projected vertically upward then its initial velocity can't be taken as zero. It must have some non-zero initial velocity only then the ball could rise up. So we can say that a) and d) options can't be correct.
When the ball reaches at the highest point then its velocity will be zero and after that the direction of velocity must become opposite to what it was initially.
In option b) the velocity does become zero but after after that it again starts moving in the same direction. Hence we can say that b) is also not the correct graph.
Finally, in option c) that the direction of velocity changes from +ve to -ve after the velocity becomes zero.
So we can say that c) is the correct option.