The cam-and-follower system in Fig. P6.36b has k = 1 kN/m, m = 0.90 kg, Y = 15 − 15 cosωt mm, and ω = 60 rad/s. The retaining spring is assembled with a preload of 2.5 N.

(a) Compute the maximum and minimum values of the contact force.

(b) If the follower is found to jump off the cam, compute the angle Θ = ωt corresponding to the beginning of jump.