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

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

Grade:11

1 Answers

India VK
42 Points
7 years ago

Use work-energy theorem:

 

Total K.E. lost = mg(h+d)

If retarding force = F then work done by this force = F.d

Now equate to find F.

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