A) \[mg\]
B) \[mg\left( 1-\frac{h}{d} \right)\]
C) \[mg\left( 1+\frac{h}{d} \right)\]
D) \[mg{{\left( 1+\frac{h}{d} \right)}^{2}}\]
Correct Answer: C
Solution :
Let the blade stops at depth d into the wood. \[{{v}^{2}}={{u}^{2}}+2aS\] Þ \[0={{(\sqrt{2gh})}^{2}}+2(g-a)d\] by solving \[a=\left( 1+\frac{h}{d} \right)g\] So the resistance offered by the wood \[=mg\left( 1+\frac{h}{d} \right)\]You need to login to perform this action.
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