The ball of mass m is guided along the vertical circular path of radius R = 1 m using the...

The ball of mass m is guided along the vertical circular path of radius R = 1 m using the arm OA. If the arm starts from ϕ = 90° and rotates clockwise with a constant angular velocity ω = 0.87 rad/s, determine the angle ϕ at which the particle starts to leave the surface of the semicylinder. Neglect all friction forces acting on the ball, neglect the thickness of the arm OA, and treat the ball as a particle.

Figure P3.47