First slide

Scalars and Vectors

Question

If A= $3 \hat{i} + 4 \hat{j}$ and B= $7 \hat{i} + 24 \hat{j}$ , the vector having the same magnitude as B and parallel to A is

Moderate

A

$5 \hat{i} + 20 \hat{j}$
B

$15 \hat{i} + 10 \hat{j}$
C

$20 \hat{i} + 15 \hat{j}$
D

$15 \hat{i} + 20 \hat{j}$

Solution

A vector parallel to A will be n $A$ or $(3 n \hat{i} + 4 n \hat{j})$
Now, $| n A | = | B |$ is given.
n = 5
$n A = 15 \hat{i} + 20 \hat{j}$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App