Required Information
A 1100-kg block B slides without friction inside a slot cut in arm OA which rotates in a vertical plane. The rod has a constant angular acceleration $\ddot{\theta}$ = 10 rad/s$^2$. Know that when $\theta$ = 45$^\circ$ and r = 0.8 m, the velocity of the block is zero.
Determine the force exerted on the block by the arm at this instant.
The force exerted on the block by the arm is N