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P2.9. Consider a block of concrete weighing 1 kg. a. How far must it fall to change its potential energy by 1 kJ? (ANS. 100

P2.9. Consider a block of concrete weighing 1 kg. a. How far must it fall to change its potential energy by 1 kJ? (ANS. 100 m) b. What would be the value of its velocity at that stage? (ANS. 44.7 m/s)

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