Find out the normal reaction at point A and B if the mass of sphere is 10kg.

Explanation

Now F.B.D.

Now resolve the forces along x & y direction

`:'` The body is in equilibrium so equate the force in x & y direction
In x -direction `( 3N_(1))/( 5) = ( 4N_(2))/( 5)` ....(1)
In y-direction `( 3N_(2))/( 5) + ( 4N_(1))/( 5) = 100` ....(2)
after solving above equation
`N_(1) = 80 N `, `N_(2) = 60N`