Q.

Find magnitude and direction of a vector, A=(6i^-8j^).

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a

10 units and 53°

b

20 units and 53°

c

30 units and 53°

d

40 units and 53°

answer is A.

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Detailed Solution

Magnitude of A|A| or A=(6)2+(-8)2=10 unitsVector A can be shown astanα=86=43α=tan-143=53°Therefore, A is making an angle of 53° from positive x-axis towards negative y-axis.
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