1. A body has a mass of 5 kg. If its velocity is 10 m/s, what is its kinetic energy?
2. From what height would the body in Problem 2.6 have to fall to attain its velocity?
3. A body weighs 25 lb. If it is moving at 10 ft./s, evaluate its kinetic energy.
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4. From what height would the body in Problem 2.8 have to fall to achieve its velocity?