First slide

Vectors

Question

Resultant of two vectors of equal magnitude A is

Moderate

A

$\sqrt{3} A at 0 °$
B

$\sqrt{2} A at 90 °$
C

2A at 120°
D

A at 180°

Solution

Resultant of two vectors $A_{R} = 2 A \cos \frac{θ}{2} = 2 A \cos 45 ° = \sqrt{2} A,$ at $θ = 90^{0}$ .

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