5. An open knife edge of mass 200 g is dropped from height 5 mon a cardboard. If the knife edge penetratesdistance 2 m into the cardboard, the average resistanceoffered by the cardboard to the knife edge is(a) 7 N(b) 25 N(c) 35 N(d) None of these

5. An open knife edge of mass 200 g is dropped from height 5 mon a c

1.	5. An open knife edge of mass 200 g is dropped from height 5 mon a cardboard. If the knife edge penetratesdistance 2 m into the cardboard, the average resistanceoffered by the cardboard to the knife edge is(a) 7 N(b) 25 N(c) 35 N(d) None of these
Answer» 7 NExplanation: F = MG(h+d)÷dF= 0.2×10(2+5)÷2=77N

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5. An open knife edge of mass 200 g is dropped from height 5 mon a cardboard. If the knife edge penetratesdistance 2 m into the cardboard, the average resistanceoffered 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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5. An open knife edge of mass 200 g is dropped from height 5 mon a cardboard. If the knife edge penetratesdistance 2 m into the cardboard, the average resistanceoffered by the cardboard to the knife edge is(a) 7 N(b) 25 N(c) 35 N(d) None of these