First slide

Scalars and Vectors

Question

Two vectors of equal magnitudes have a resultant equal to either of them, then the angle between them will be

Moderate

A

$30 °$
B

$120 °$
C

$60 °$
D

$150 °$

Solution

$R = \sqrt{A^{2} + A^{2} + 2 A A \cos θ}$
R=A at $θ = 120 °$

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