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PhysicsVectorsAddition/SubtractionMedium2 minQB

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If the angle between two forces increases from 0 to 180° the magnitude of their resultant :-

Answer:

Solution:

For two forces of fixed magnitudes:

$R^{2} = F_{1}^{2} + F_{2}^{2} + 2 F_{1} F_{2} cos θ$

As the angle increases from $0^{\circ}$ to $18 0^{\circ}$ , $cos θ$ decreases from 1 to -1.

The resultant magnitude therefore decreases. Answer: A.

Subject:PhysicsTopic:VectorsSubtopic:Addition/Subtraction

⏱ 2mℹ️ Source: QB

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