3-1.Vectors
medium

The resultant of these forces $\overrightarrow{O P}, \overrightarrow{O Q}, \overrightarrow{O R}, \overrightarrow{O S}$ and $\overrightarrow{{OT}}$ is approximately $\ldots \ldots {N}$.

[Take $\sqrt{3}=1.7, \sqrt{2}=1.4$ Given $\hat{{i}}$ and $\hat{{j}}$ unit vectors along ${x}, {y}$ axis $]$

A

$9.25 \hat{{i}}+5 \hat{{j}}$

B

$3 \hat{{i}}+15 \hat{{j}}$

C

$2.5 \hat{i}-14.5 \hat{{j}}$

D

$-1.5 \hat{{i}}-15.5 \hat{{j}}$

(JEE MAIN-2021)

Solution

$\hat{F}_{x}=\left(10 \times \frac{\sqrt{3}}{2}+20\left(\frac{1}{2}\right)+20\left(\frac{1}{\sqrt{2}}\right)-15\left(\frac{1}{\sqrt{2}}\right)-15\left(\frac{\sqrt{3}}{2}\right)\right) \hat{i}$

$=9.25 \hat{i}$

$\vec{F}_{y}=\left(15\left(\frac{1}{2}\right)+20\left(\frac{\sqrt{3}}{2}\right)+10\left(\frac{1}{2}\right)-15\left(\frac{1}{\sqrt{2}}\right)-20\left(\frac{1}{\sqrt{2}}\right)\right) \hat{j}$

$=5 \hat{j}$

Standard 11
Physics

Similar Questions

Start a Free Trial Now

Confusing about what to choose? Our team will schedule a demo shortly.