A 15 kg crate falls from a height of 20 m onto a spring, Ask an Expert

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A 1.5 kg crate falls from a height of 2.0 m onto a spring scale where the spring constant is 1.5 ´ 105 N/m. Ignoring the small amount that the spring compresses when you calculate the gravitational potential energy, at the instant of maximum compression the scale reads?

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