A block of mass m is attached to a spring of constant k. The block is released from rest w...

A block of mass m is attached to a spring of constant k. The block is released from rest when the spring is in a horizontal and undeformed position. Knowing that r0 = 4 ft, use computational software to determine (a) for k/m = 15 s-2, 20s-2 and 25 s-2, the length of the spring and the magnitude and direction of the velocity of the block as the block passes directly under the point of suspension of the spring, (b) the value of k/m for which that velocity is horizontal.