A block of mass is released from rest at a height above the top of an uncompressed…
PHYSICS · Subjective · AP · Physics 1: Algebra-based · Work Energy and Power · Work Energy and Power
Problem
A block of mass m is released from rest at a height h above the top of an uncompressed vertical spring fixed to the ground. When the block momentarily comes to rest after compressing the spring by x, its speed is zero even though it has fallen through a distance (h+x). Explain briefly why the block’s speed is zero at that instant.