3. A 4kg rock is dropped from an unknown height above a spring. It hits a spring with a spring constant of 750N/m and co
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3. A 4kg rock is dropped from an unknown height above a spring. It hits a spring with a spring constant of 750N/m and co
3. A 4kg rock is dropped from an unknown height above a spring. It hits a spring with a spring constant of 750N/m and compresses the spring 45cm to the ground. How high above the spring was the rock dropped?
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