1.

V) Given v, = 5i+2j and v2 = ai-6j areperpendicular to each other, determine thevalue of a.Ans:12upon 5​

Answer»

V1.V2 = |V1|*V2 COS90

(5i+2j )(ai-6j )=0

5a - 12=0

a = 12/5



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