AP EAMCET202023 Sep 2020Morning ShiftPhysicsWork, Power and EnergyActual
A uniform chain of mass M and length L is lying on a smooth horizontal table, with half of its length hanging down. The work done is pulling the entire chain up the table is
Options
- AM   g L 2
- BM g L 4
- CM g L 8
- DM g L 16
Correct answer
C. M g L 8
Step-by-step solution
Work done is pulling the entire chain up the table = change in potential energy W = U f - U i ⇒ W = 0 - - M 2 g L 4 = M g L 8