A cuboidal block is kept in a groove. The groove is made to rotate with angular acceleration α . Find the magnitude of the normal reaction on block by the walls of groove given the blocks mass is mkg and it is kept at a distance of r from the axis of rotation.
Draw free body diagram of block
So block's weight is balanced by N1
N1 = mg
Block has a tangential acceleration which is given by N2
N2 = m α r
So total normal
Nt=√N21+N22
Nt=√(mg)2+(mαr)2)
Nt=m√g2+(rα)2