If Ā= 2i^ - j^ and B=i - 2j, find the scalar magnitude and directions

1.	If Ā= 2i^ - j^ and B=i - 2j, find the scalar magnitude and directions of(1)A(ii) B and(iii) A+B
Answer» ANSWER: i)√5 ii)√5 iii)√18 Explanation: A=a i+b j B=xi+y j A+B=(a+x)i +(b+y)j MAGNITUDE of A= √(a²+b²) magnitude of B=√(x²+y²) magnitude of A+B=√( (a+x)²+(b+x)²) direction of UNIT VECTOR of A is= vector A/magnitude of A i hope YOu understand.............

If Ā= 2i^ - j^ and B=i - 2j, find the scalar magnitude and directions of(1)A(ii) B and(iii) A+B

Answer»

ANSWER:

i)√5

ii)√5

iii)√18

Explanation:

A=a i+b j

B=xi+y j

A+B=(a+x)i +(b+y)j

MAGNITUDE of A= √(a²+b²)

magnitude of B=√(x²+y²)

magnitude of A+B=√( (a+x)²+(b+x)²)

direction of UNIT VECTOR of A is= vector A/magnitude of A

i hope YOu understand.............

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If Ā= 2i^ - j^ and B=i - 2j, find the scalar magnitude and directions of(1)A(ii) B and(iii) A+B​

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If Ā= 2i^ - j^ and B=i - 2j, find the scalar magnitude and directions of(1)A(ii) B and(iii) A+B