The device pictured in the figure below entertains infants while keeping them from wandering. The child bounces in a harness suspended from a door frame by a spring constant. (a) If the spring stretches 0.26 m while supporting an 8 kg child, what is its spring constant? N m (b) What is the time for one complete bounce of this child? S (c) What is the child's maximum velocity if the amplitude of her bounce is 0.18 m? m S

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