+91-8076753736 support@wiredfaculty.com
logo
logo

A PHP Error was encountered

Severity: Notice

Message: Undefined variable: temp_qds

Filename: Questions_Page/Ncert_Question.php

Line Number: 316

Backtrace:

File: /home/wiredfa1/public_html/application/views/final/Questions_Page/Ncert_Question.php
Line: 316
Function: _error_handler

File: /home/wiredfa1/public_html/application/controllers/Home.php
Line: 235
Function: view

File: /home/wiredfa1/public_html/index.php
Line: 315
Function: require_once

Sponsor Area

Vector Algebra

Question
CBSEENMA12035698
Wired Faculty App

If space straight a with rightwards arrow on top space and space straight b with rightwards arrow on top space are space perpendicular space vectors comma space open vertical bar straight a with rightwards arrow on top plus straight b with rightwards arrow on top close vertical bar space equals space 13 space and space open vertical bar straight a with rightwards arrow on top close vertical bar space equals 5 space and space find space the space value space of space open vertical bar straight b with rightwards arrow on top close vertical bar.

Solution

Given that straight a with rightwards arrow on top space and space straight b with rightwards arrow on top are two perpendiculars vectors.
Thus, straight a with rightwards arrow on top. space straight b with rightwards arrow on top space equals space 0
Also given that, open vertical bar straight a with rightwards arrow on top plus straight b with rightwards arrow on top close vertical bar equals 13 space and space open vertical bar straight a with rightwards arrow on top close vertical bar equals 5.
We need to find the value of straight b with rightwards arrow on top.
Consider open vertical bar straight a with rightwards arrow on top plus straight b with rightwards arrow on top close vertical bar squared colon
open vertical bar straight a with rightwards arrow on top plus straight b with rightwards arrow on top close vertical bar squared space equals space open vertical bar straight a with rightwards arrow on top close vertical bar squared plus 2 open vertical bar straight a with rightwards arrow on top. straight b with rightwards arrow on top close vertical bar plus open vertical bar straight b with rightwards arrow on top close vertical bar squared 13 squared space equals space 5 squared plus 2 cross times 0 plus open vertical bar straight b with rightwards arrow on top close vertical bar squared 169 space equals 25 plus open vertical bar straight b with rightwards arrow on top close vertical bar squared open vertical bar straight b with rightwards arrow on top close vertical bar squared space equals 169 minus 25 open vertical bar straight b with rightwards arrow on top close vertical bar squared space equals 144 straight b with rightwards arrow on top space equals space 12

Some More Questions From Vector Algebra Chapter

Classify the following measures as scalars and vectors.
20 m/s2

Classify the following measures as scalars and vectors.
time period

Classify the following measures as scalars and vectors.
distance

Classify the following measures as scalars and vectors.
force

Classify the following measures as scalars and vectors.
velocity

Classify the following measures as scalars and vectors.
work done

Mock Test Series

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation