1. A spring is stretched 0.65 m from equilibrium by a force of 299 N. (a) Determine the spring constant. (b) Determine the work done on the spring to stretch it 0.25 m from equilibrium
2. A 35 kg student bounces up from a trampoline with a speed of 7.4 m/s. (a) Determine the work done on the student by the force of gravity when she is 1.3 m above the trampoline. (b) Determine her speed at 1.3 m above the trampoline.

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