If vec A = 2hat i + hat j - hat k,vec B = hat | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) Let $\vec D = \vec A + \vec B$.$\vec D = (2\hat i + \hat j - \hat k) + (\hat i + 2\hat j + 3\hat k) = 3\hat i + 3\hat j + 2\hat k$.We are given $\

Vedclass · Accepted Answer

$90$

Vedclass · Answer

(D) Let $\vec D = \vec A + \vec B$.$\vec D = (2\hat i + \hat j - \hat k) + (\hat i + 2\hat j + 3\hat k) = 3\hat i + 3\hat j + 2\hat k$.We are given $\vec C = 6\hat i - 2\hat j - 6\hat k$.The angle $	heta$ between two vectors $\vec D$ and $\vec C$ is given by $\cos 	heta = \frac{\vec D \cdot \vec C}{|\vec D| |\vec C|}$.Calculate the dot product $\vec D \cdot \vec C = (3)(6) + (3)(-2) + (2)(-6) = 18 - 6 - 12 = 0$.Since the dot product is $0$,the vectors are perpendicular to each other.Therefore,the angle $	heta = 90^o$.

If $\vec A = 2\hat i + \hat j - \hat k$,$\vec B = \hat i + 2\hat j + 3\hat k$ and $\vec C = 6\hat i - 2\hat j - 6\hat k$,then the angle between $(\vec A + \vec B)$ and $\vec C$ will be ....... $^o$.

Similar Questions

Let $\vec{A} = 2 \hat{i} - 3 \hat{j} + 4 \hat{k}$ and $\vec{B} = 4 \hat{i} + \hat{j} + 2 \hat{k}$,then $|\vec{A} \times \vec{B}|$ is equal to:

If $F_1$ and $F_2$ are two vectors of equal magnitudes $F$ such that $|F_1 \cdot F_2| = |F_1 \times F_2|$,then $|F_1 + F_2|$ is equal to

If $\vec A$ and $\vec B$ are perpendicular vectors,where $\vec A = 5\hat i + 7\hat j - 3\hat k$ and $\vec B = 2\hat i + 2\hat j - a\hat k$,then the value of $a$ is:

If $\overrightarrow{F}=(4 \hat{i}-10 \hat{j}) \text{ N}$ and $\overrightarrow{r}=(-5 \hat{i}-3 \hat{j}) \text{ m}$,then $(\overrightarrow{r} \times \overrightarrow{F})$ is

If $\vec{A}$ and $\vec{B}$ are two vectors satisfying the relation $\vec{A} \cdot \vec{B} = |\vec{A} \times \vec{B}|$,then the value of $|\vec{A} - \vec{B}|$ will be:

Vedclass Test Series

Exam Paper Generator

Online Exam Module