Question

1 . two rigid bodies have same angular momentum about their axis of rotation . which of the bodies will have greater kinetic energy?

2 . two rigid bodies have same moment of inertia about their axes of symmetry . which will have greater kinetic energy?

Answer 1

let mass of light body be m and heavy body be M
given that mV=Mv
we know that K E =psquare /2m
since as p constant K E is inversely proportional to the mass of the object 
hence light body has greater kinetic energy

Answer 2

Answer:

k .e is inversely proportional to mass .so lighter mass will have greater k.e