Question

solve this question
this question is from class11 physics cbse board
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Answer 1

Thanks for asking the question!

SOLUTION::

As it is given in question ,

 a vector = 4i +3j

b vector = 3i + 4j 

(a) Magnitude of a vector , |a| = √(4² + 3²) = √25 = 5

 (b) Magnitude of b vector , |b| = √(3²+4²) = √25 = 5

(c) Magnitude of a vector + b vector , |a+b| = |4i + 3j +3i + 4j| = |7i + 7j|  

                                                                                                = √(7² + 7²)

                                                                                                = 7√2

(d) Magnitude of a vector - b vector,|a+b| = |( 4-3)i +(3-4)j| = 1i -1j 

                                                                                           =√[1²+(-1)²]

                                                                                           = √2

All parts are solved.

Hope this helps you...

Answer 2

Explanation:

hope it helps u.....❣️