Posted by **DJ** on Monday, November 23, 2009 at 8:44pm.

A 55 kg trampoline artist jumps vertically upward from the top of a platform with a speed of 5.5 m/s. (Ignore small changes in gravitational potential energy.)

(a) How fast is he going as he lands on the trampoline, 3.0 m below?

(b) If the trampoline behaves like a spring of spring constant 5.2 104 N/m, how far does he depress it?

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