A 0.5-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 = 10 rad/s². Know that when 0 = 66° and r = 0.8 m, the velocity of the block is zero. B A Determine the force exerted on the block by the arm at this instant. (You must provide an answer before moving on to the next part.) The force exerted on the block by the arm is EN.

A 0.5-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 = 10 rad/s². Know that when 0 = 66° and r = 0.8 m, the velocity of the block is zero. B A Determine the force exerted on the block by the arm at this instant. (You must provide an answer before moving on to the next part.) The force exerted on the block by the arm is EN.