First slide
Scalars and Vectors
Question

Arrange the vectors additions so that their magnitudes are in the increasing order

a) two vector AandB are parallel      

b) Two vectorsAandB are anti parallel          

c) Two vectorsAandB making an angle 60°

d) Two vectors AandB making 120°.

 

Easy
Solution

R=A2+B2+2ABcosθ 

If θ=0 then R=A+B

If θ=60 then R=A2+B2+2ABcos60==A2+B2+AB

If θ=120 then R=A2+B2+2ABcos120==A2+B2-AB

If θ=180 then R=A-B

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