Kinematics Question 139

Question: The angle made by the vector A=i^+j^ with x- axis it’s [EAMCET (Engg.) 1999]

Options:

A) 90

B) 45

C) 22.5

D) 30

Show Answer

Answer:

Correct Answer: B

Solution:

A=i^+j^ therefore |A|=12+12=2

cosα=Ax|A|=12=cos45 \ α=45



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