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
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
Let the blade stops at depth d into the wood.
⇒ ⇒ 
by solving 
So the resistance offered by the wood 
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