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The magnitude of the component of the vector 2i+3j+k along 3i+4k isa)1/2b)14/5c)6/5e)2

The magnitude of the component of the vector 2i+3j+k along 3i+4k isa)1/2b)14/5c)6/5e)2

Grade:11

1 Answers

Arun
25750 Points
6 years ago
Unit vector along 3i +4k
= (3i +4k)/ 5
Now magnitude of vector the component of vector 2i +3j+ k in the direction of 3i +4k
Take dot product
= (2i +3j +k).(3i +4k)/5
= (6 +0 +4)/5
= 10/5
= 2
Hence option E is correct

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