Add vectors overrightarrow{ A }, overrightarrow{ B } and overrightarrow{ C } each having magnitude o

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3-1.Vectors

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Add vectors $\overrightarrow{ A }, \overrightarrow{ B }$ and $\overrightarrow{ C }$ each having magnitude of $50$ unit and inclined to the $X$-axis at angles $45^{\circ}, 135^{\circ}$ and $315^{\circ}$ respectively.

A

$50$

B

$55$

C

$70$

D

$85$

Solution

Angle between $\vec{B}$ and $\vec{C}=315^{\circ}-135^{\circ}=180^{\circ}$

$\therefore$ They balance each other

so sum of these three is $\vec{A}=50$ unit at $45^{\circ}$ from $X$-axis

Standard 11

Physics

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