A ball is dropped from the certain height on the surface of glass. It collides elastically and comes back to initial position. If this process is repeated then the corresponding velocity- time graph is

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Solution

The correct option is C
Acceleration will be constant 'g' so slope of the graph will be constant.

So, we can conclude that options (a) & (d) are wrong.

There will be discontinuity at the time of collision with the surface of glass as impulse will be very short timed and also initial velocity will increase from zero till first collision.

Hence, option (c) is the correct answer.

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