Question

Consider a rubber ball freely falling from a height $h\, =\, 4.9\, m$ 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 the height as function of time will be :

• A.
• B.
• C.
• D.

Answer 1

Answer: (C)

Answer 2

$h=\frac{1}{2}gt^{2}, \,\,$ $v = - gt$ and after the collision, $v = gt.$