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Suppose veca is a vector of magnitude 4....

Suppose `veca` is a vector of magnitude 4.5 unit due north. What is the vector a. `3veca, b -4 veca`?

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The correct Answer is:
(a)13.5unit along north (b) 18unit along south
`veca` is a vector of magnitude 4.5 unit due north
(a) `3|veca|=3xx4.5=13.5,`, `3|veca|` is along north having magnitude 13.5 units.
(b)`-4|veca|=-4xx4.5=18units`
`-4veca` is a vector of magnitude 18 units due south.
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