Problem -JAP23 A block of mass i sits at position on a horizontal frictionless table ) and is connected to a massless unstretched spring of force constant / and length a as shown at right. The other end of the spring is attached to the origin O, and can freely swing around it. An initial impulse gives the block a velocity go, as shown! When the block reaches position B, at which the spring top View is perpendicular to its original orientation, the length of the spring has become 2d. (a) What pliysicalquantities are conserved as the block moves from A to B! Why? (b) Let the initial velocity be nov2kdimi Find the mag nitude of the block's velocity at B in terms of of and find the angle this velocity makes with the spring direction at