NEET Physics Work,Energy and Power Questions Solved


An open knife edge of mass 'm' is dropped from a height 'h' on a wooden floor. If the blade penetrates upto the depth 'd' into the wood, the average resistance offered by the wood to the knife edge is 

(1) mg

(2) mg1hd

(3) mg1+hd

(4) mg1+hd2

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