Please Help, totally confused A 0.6 kg collar slides freely along a curved rod.

Question

Please Help, totally confused

A 0.6 kg collar slides freely along a curved rod. A massless linear spring is attached to the collar and the spring constant is k = 20 N/m. At point A the collar has a speed of 2 m/s to the right and the distance between points A and O is 0.7 m. The unstretched length of the spring is 0.1m and point A is 0.4 meters below point O. Calculate the velocity of the collar just before it hits the wall at point B. Calculate the force that the spring exerts on the collar at point B.

Explanation / Answer

b) force exert on spring at b=(20)*(0.3)=6N

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