Question

Vector $\overrightarrow{c}$ in figure represents –

• A. $\overrightarrow{a} + \overrightarrow{b}$
• B. $\overrightarrow{a} - \overrightarrow{b}$
• C. $\overrightarrow{b} - \overrightarrow{a}$
• D. $- \overrightarrow{a} - \overrightarrow{b}$

Answer 1

Answer: (D)

$- \overrightarrow{a} - \overrightarrow{b}$

Answer 2

According to polygon law

$\overset{\rightarrow}{a}$ + $\overset{\rightarrow}{b}$ + $\overset{\rightarrow}{c}$ = 0

\ $\overset{\rightarrow}{c}$ = – ($\overset{\rightarrow}{a}$ + $\overset{\rightarrow}{b}$)