Question #a2be2

1 Answer
A08
Feb 9, 2017

C

Explanation:

At mean position all the potential energy has been converted in to bob's kinetic energy. Setting up the equation we get

PE=KE

Using formulae for both
mgDeltah=1/2mv^2
=>v^2=2gDeltah
=>v=sqrt(2gDeltah)

Inserting given values we get
v=sqrt(2xx10xx0.1)
=>v=sqrt2" ms"^-1

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