while jumping on a trampoline, a child reaches a high point of 5m above the trampoline surface. From there, the child falls back to the trampoline....

while jumping on a trampoline, a child reaches a high point of 5m above the trampoline surface. From there, the child falls back to the trampoline. The trampoline stretches 0.5m until the child comes to a momentary stop. Assume that once the child strikes the surface of the trampoline he experiences a constant deceleration . What is the magnitude of the childs deceleration due to the trampoline stopping his fall?