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Standard XII

Physics

Conservation of Momentum

A particle mo...

Question

A particle moves in the x-y plane under the action of a force $\to F = - 2 k s i n k t (^i +^j)$ at any time t its linear momentum is given by $P_{x} = 2 c o s (k t) a n d P_{y} = 2 c o s (k t)$ The angle between $\to F a n d \to P$ at time t is

0^{\circ}

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30^{\circ}

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90^{\circ}

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180^{\circ}

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Solution

The correct option is D $180^{\circ}$
$\to P = 2 c o s k t (^i +^j) F = - 2 k s i n k t (^i +^j)$
Angle between $\to F a n d \to P i s 180^{\circ}$

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A particle moves in the x-y plane under the action of a force →F=−2k sin kt(^i+^j) at any time t its linear momentum is given by Px=2cos(kt)andPy=2cos(kt) The angle between →F and→P at time t is

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