4)a smooth 2 kg collar C shown in figure is attached to a spring having a stiffness of k=3N/m and an unstretched length of 0.75m. If the collar is released from rest at A,determine its acceleration and the normal force at the instant y=1m. (given g=9.8 m/s2 and tan 37°= 0.75)
a) 9.2 m/s2, 0.90 N
b) 19.0 m/s2, 0.83 N
c) 5.5 m/s2, 0.62 N
d)8.20 m/s2 , 0.68 N
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