an open knife edge of mass 200 g is dropped from height 5 m on a cardboard. if the knife edge penetrates distance 2 m into the cardboard, the average resistance offered by the cardboard to the knife edge is: (a) 7 n (b) 25 n (c) 35 n (d) none of these\

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05-10-2022
Physics

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an open knife edge of mass 200 g is dropped from height 5 m on a cardboard. if the knife edge penetrates distance 2 m into the cardboard, the average resistance offered by the cardboard to the knife edge is: (a) 7 n (b) 25 n (c) 35 n (d) none of these\

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