First slide

Law of conservation of momentum and it's applications

Question

A batsman hits a sixer and the ball touches the ground outside the cricket ground. Which of the following graph describes the variation of the cricket ball's vertical velocity v with time between the time t₁ as it leaves the bat and time t₂ when it touches the ground

Moderate

A
B
C
D

Solution

At time t₁ the velocity of ball will be maximum and it goes on decreasing with respect to time.
At the highest point of path its velocity becomes zero, then it increases but direction is reversed
This explanation match with graph (c).

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