Texts: A rubber ball of mass m = 0.450 kg fell from an unknown height and strikes the concrete floor 1.05 s after release, then rebounds to a height of 2.75 m. Calculate:
a) The initial height of the ball above the ground at release.
b) The speed with which the ball struck the floor.
c) The speed with which it rebounded.
d) The change in velocity due to the impact.