Angle between the rectangular components of a vector is________?
Correct answer: D. 90°
- A. Zero
- B. 30°
- C. 45°
- D. 90°
Explanation
Rectangular components are components along two mutually perpendicular axes. Perpendicular directions are separated by 90°, so the angle between the components is 90°. A common mistake is choosing 45° because components are sometimes drawn symmetrically at 45°, but that is not required.
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About Rectangular Components
A vector is resolved into perpendicular horizontal and vertical components using trigonometric relations, usually as Ax = A cos θ and Ay = A sin θ when θ is measured from the horizontal. Questions involve signs in different quadrants, reconstructing a resultant from components, and using components to analyse equilibrium.
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