Can someone tell me the formula for this?

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.

The process of a material going through a change of state from a gas to a liquid

Select the correct answer. what happens to the acceleration of an object if the net force on it increases? a. the acceleration increases. b. the acceleration decreases. c. the acceleration becomes zero. d. the acceleration remains the same