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A target is made of two plates, one of wood and the other of iron. The thickness of the wooden plate is 4 cm and that of iron plate is 2 cm. A bullet fired goes through the woodfirst and then penetrates 1 cm into iron. A similar bullet fired with the same velocity from opposite direction goes through ironfirst and then penetrates 2 cm into wood. If a_(1) and a_(2) be the retardations offered to the bullet by wood and iron plates, respectively, then |
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Answer» `a_(1)=2a_(2)` |
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