Question #a2be2

1 Answer
Feb 9, 2017

Answer:

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#