1. A rubber cube of volume 0.8cm3 falls vertically through 6m onto a concrete floor. The cube .
experiences a maximum strain of 1.11% and remains in contact with the ground for 0.8s
before rebounding vertically upwards. Given that the cube impacted with the ground such
that one face of the cube was in complete contact with the ground, find the maximum EPE
stored in the cube at maximum strain.
Density of the cube = 0.9kgm3
A student suggests that the Ek of the cube on impact should be equal to the maximum EPE
stored. Justify whether you agree with the student.​