The following particulars relate to a symmetrical circular cam operating a flat-faced follower :Least radius = 25 mm ; nose radius = 8 mm. lift of the valve = 10 mm, angle of action of cam =120°, cam shaft speed = 1000 r.p.m.18.Determine the flank radius and the maximum velocity, acceleration and retardation of the follower. Ifthe mass of the follower and valve with which it is in contact is 4 kg, find the minimum force to beexerted by the spring to overcome inertia of the valve parts.[Ans. 88 mm ; 1.93 m/s, 690.6 m/s", 296 m/s ; 1184 NJ

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