A body of mass 1 kg, connected to an elastic spiral spring, is held at point A on a circular ring of radius 0.5 m as shown in the figure below. When the body is released, it can only move on a circular track, without friction, in a horizontal plane. The length of the spring when unloaded is 
. A force of 32 N is required to extend the spring by 80 cm.
How much force does the spring exert on the body at point A?
What are the kinetic and elastic energies at point A?
Describe the motion of the body when it is released.
Calculate the acceleration of the body at point A.
What are the kinetic and elastic energies at point B?
What is the speed of the body at point B?
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, and the elastic energy is 
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