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Average Velocity in 2D Motion

The angular i...

Question

The angular impulse, due to the force about $O$ , is

\frac{\sqrt{5}}{4} < F > △ t L^k

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\frac{\sqrt{5}}{2} < F > △ t L^k

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\frac{\sqrt{3}}{4} < F > △ t L^k

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\frac{\sqrt{3}}{2} < F > △ t L^k

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Solution

The correct option is D $\frac{\sqrt{3}}{4} < F > △ t L^k$
Angular impulse
$=< F >_{x} Δ t r =< F > cos 30^{\circ} Δ t \frac{L}{2} = \frac{\sqrt{3}}{4} < F > Δ t L$

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