Consider the following statement. When jumping from some height, you should bend your knees as you come to rest instead of keeping your legs stiff. Which of the following relations can be useful in explaining the statement?
where symbols have their usual meaning.

Δ P_{1} = - Δ P_{2}

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Δ E = - Δ P E + K E = 0

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F Δ t = - m Δ F

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Δ x \propto Δ F

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Solution

The correct option is C $F Δ t = - m Δ F$
$F Δ t = - m Δ v$
$\Rightarrow F = - \frac{m Δ v}{t}$
By doing so time of change in momentum increases and impulsive force on knees decreases.

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Consider the following statement. When jumping from some height, you should bend your knees as you come to rest instead of keeping your legs stiff. Which of the following relations can be useful in explaining the statement? where symbols have their usual meaning.

The correct option is C FΔt=−mΔFFΔt=−mΔv⇒F=−mΔvtBy doing so time of change in momentum increases and impulsive force on knees decreases.

Consider the following statement. When jumping from some height, you should bend your knees as you come to rest instead of keeping your legs stiff. Which of the following relations can be useful in explaining the statement?
where symbols have their usual meaning.

The correct option is C $F Δ t = - m Δ F$
$F Δ t = - m Δ v$
$\Rightarrow F = - \frac{m Δ v}{t}$
By doing so time of change in momentum increases and impulsive force on knees decreases.