Knockout JEE Main April 2021 (One Month)
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Consider a rubber ball freely falling from a height onto a horizontal elastic plate. Assume that the duration of collision is negligible and the collision with the plate is totally elastic. Then the velocity as a function of time and the height as function of time will be
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As we learnt in
If only conservative forces act on a system, total mechnical energy remains constant -
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As the ball fall its velocity increases
as it reflect after collistion
So velocity is linear.
Increasing while going down and decreasing while going up.
So correct graph is 3
Option 1)
This is an incorrect option.
Option 2)
This is an incorrect option.
Option 3)
This is the correct option.
Option 4)
This is an incorrect option.