Question

both of question 15......do it..plz

Answer 1

[15] [b] = M.I = 2MR^2/5
                 ACCORDING to the theorem of parallel axes, the moment of inertia of a body about any axis is equal to the sum of the moment of the inertia of the body about a parallel axis passing through its center of mass and the product of its mass and the square of the distance between the two parallel axis. the MI about a tangent of a sphere = MR^2 /5 +MR^2= 7MR^2  /5  

hope this helps u
one thing more the last two pics will help u in the 15 [a] question if u figure them out okay the black on isn't clear but the things that are written are important and the last one is just to show how it looks 
have a nice exam