HW31#3 – A chain is held on a table with one-fourth hanging over the edge … pull the hanging part back?

歡迎來到Yogi老師解題給你看,今天我要講解的是AP Physics C Mechanics的問題

In the figure below, a chain is held on a frictionless table with one-fourth of its length hanging over the edge. If the chain has length L = 26 cm and mass m = 0.011 kg, how much work is required to pull the hanging part back onto the table?