A ball of mass m = 2.60 kg, starting from rest, falls a vertical distance h = 55.0 cm before striking a
vertical coiled spring, which is compresses an amount Y = 15.0 cm. Determine the spring constant of the
spring. Assume the spring has negligible
Reflection from a Straight Barrier:
When a straight wave runs into a straight barrier, head on, it is reflected back along its original
path. If a wave encounters a straight barrier at an angle, the wavefront is also reflected at an
angle to the barrier.