Question

a particle is released from the possition A on a smooth track.when the particle reaches at B,then normal reaction on it by the track is
A)mg
B)2mg
C)2/3mg
D)m2g/h

Answer 1

then normal reaction on by the track is a)mg

Answer 2

obviously it Will be mg as normal never changes unless any external force is applied on the block.
normal is the force that is applied by any two objects or any object or surface touching each other