Stone Rests on Spring Figure 10-34 shows an 8.00 kg stone resting on a spring. T

Question

Stone Rests on Spring Figure 10-34 shows an 8.00 kg stone resting on a spring. The spring is compressed 7.0 cm by the stone.

Figure 10-34
(a) What is the spring constant?
N/cm
(b) The stone is pushed down an additional 30.0 cm and released. What is the elastic potential energy of the compressed spring just before that release?
J
(c) What is the change in the gravitational potential energy of the stone-Earth system when the stone moves from the release point to its maximum height?
J
(d) What is that maximum height, measured from the release point?
m


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Explanation / Answer

Stone Rests on Spring Figure 10-34 shows an 8.00 kg stone resting on a spring. The spring is compressed 7.0 cm by the stone. Figure 10-34 (a) What is the spring constant? N/cm k = F/x = mg/x = (8.0kg)(9.8) / 0.07m = 11200 N/m = 112 N/cm

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