Problem: A pole-vaulter is nearly motionless as he clears the bar, set 4.2m above the ground. He then falls onto a thick pad. The top of the pad is 80 cm above the ground, and it compresses by 50cm as he comes to rest.
Part A- What is his acceleration as he comes to rest on the pad?
Explain the each and every step in derail for above problem. Thanks in advance.