If vector a lies in the 4th quadrant and makes an angle of 60 with y axis, what is its direction given by 30°, 330°, 270°, or 60°?
Correct answer: C. 330
- A. 30
- B. 270
- C. 330
- D. 60
Explanation
Exp: 1st quadrant -> 0 to 90 degrees 2nd quadrant -> 91 to 180 degrees 3rd quadrant -> 181 to 270 degrees 4th quadrant -> 271 to 360 degrees 270 + 60 degrees with y-axis = 270 + 60 = 330 degrees
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Vectors have magnitude and direction, unlike scalars, and are combined by head-to-tail or parallelogram methods. Work covers rectangular components, equilibrium when the resultant force is zero, the scalar product for work and projections, and the vector product for torque and cross-product direction using the right-hand rule.
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