Question

A particle is moving in a circle of radius R with constant speed V then changing velocity after the particle has travelled a distance equal to 1 by 8 of the circumference of the circle is

Answer 1

angle =360/8=45 degree
delta V=rootof(v^2+v^2-2*v^2*1/rootof2)
= ...........(2v^2-root2*v^2)
= v*rootof(2-root2)