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A child bounces in a harness suspended from a door frame by a spring. (a) If...

A child bounces in a harness suspended from a door frame by a spring. (a) If the spring stretches 0.250 m while supporting an 8.0-kg child at rest, what is its spring constant? (b) What is the period for one complete bounce of this child? (c) What is the child’s maximum velocity if the amplitude of her bounce is 0.200 m? (d) What does her minimum amplitude have to be for the child to feel weightless (i.e., barely lift up from the harness) at the top of her swing?

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