A steel ball is released from rest a distance above a rigid horizontal surface and bounces several time. The diagram shows how its velocity varies with time. Which statement correctly explains why the areas $X$ and $Y$ are equal?
A steel ball is released from rest a distance above a rigid horizontal surface and bounces several time. The diagram shows how its velocity varies with time. Which statement correctly explains why the areas $X$ and $Y$ are equal?
- A
The ball's acceleration is not same during its upward and downward motion.
- B
The speed at which the ball leaves the surface after an impact is equal to the speed at which it returns to the surface for the next impact.
- C
For one impact, the speed at which the ball hits the surface equals the speed at which it leaves the surface
- D
The ball rises and falls through the same distance between the impact $1$ & $2$ .
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