An open knife edge of mass M is dropped from a height h on wooden floor. If the blade penetrates a distance s into the wood, the average resistance offered by the wood to the blade is

Options

A. `Mg`
B. `Mg(1+(h)/(s))`
C. `Mg(1-(h)/(s))`
D. `Mg(1+(h)/(s))^(2)`

Answer

B