First slide

Vectors

Question

Forces proportional to AB, BC and 2CA act along the sides of a triangle ABC in order . Their resultant is represented in magnitude and direction By

Easy

A

$\vec{CA}$
B

$\vec{AC}$
C

$\vec{BC}$
D

$\vec{CB}$

Solution

$Resultant \vec{A B} + \vec{B C} + 2 \vec{C A} = \vec{A C} + 2 \vec{C A} = - \vec{C A} + 2 \vec{C A} = \vec{C A}$

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