A 500-g collar can slide without friction along the semicircular rod BCD. The spring is of constant 320 N/m and its undeformed length is 200 mm. Knowing that the collar is released from rest at B, determine the speed of the collar as it passes through C in m/s. (Hint: be careful in analyzing the stretched length of the spring; use conservation of energy) r = 150 mm

A 500-g collar can slide without friction along the semicircular rod BCD. The spring is of constant 320 N/m and its undeformed length is 200 mm. Knowing that the collar is released from rest at B, determine the speed of the collar as it passes through C in m/s. (Hint: be careful in analyzing the stretched length of the spring; use conservation of energy) r = 150 mm