NEET-XII-Physics
P1 year:2019
Qstn# 1 Next-Qstn
- #1When a block of mass M is suspended by a long
wire of length L, the length of the wire
becomes (L + l). The elastic potential energy
stored in the extended wire is :
(1) Mgl
(2) MgL
(3)``\frac12 Mgl ``
(4)``\frac12 MgL ``digAnsr: 3Ans : ( 3 )
Sol.
U = ``\frac12 `` (work done by gravity)
U = ``\frac12 ``Mgl