A man drops 10 kg rock from the top of a 5.0 metre ladder. What is its kinetic energy when it reaches the ground? What is its speed just before it reaches the ground?
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1. 490J,7root2 m/s. 2. 290J, 7 m/s3. 190J,7root2 m/s. 4. NoneGiven, Mass = 10 kgHeight = 5 m...
