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A arrow that has a mass of 100g is fired horizontally at a cup of tea of mass 15kg that is suspended from a
thin wire. After the bullet passed through the jelly, the experimenters measured the bullet to have a speed of
10 m/s and the cup of tea swung to a maximum height of 35 cm higher than its initial height. How much
energy was lost to heating up the cup of tea and the bullet & what |was the initial velocity of the bullet?

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