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Practice Questions

A vector has a magnitude of 2√2 and lies on the line y = -x in the second quadrant. Its components are…

A. (2, -2)
B. (-2, 2) ✓
C. (-√2, √2)
D. (√2, -√2)
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nmdcat.online AA Physics
Jun 25, 2026

For the same vector in the previous question, as the angle increases from 0° to 90°, its vertical component…

A. increases ✓
B. decreases
C. remains constant
D. first decreases then increases
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nmdcat.online AA Physics
Jun 25, 2026

A force vector has a magnitude F. If its angle with the horizontal is increased from 0° to 90°, its horizontal component…

A. increases
B. decreases ✓
C. remains constant
D. first increases then decreases
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nmdcat.online AA Physics
Jun 25, 2026

An object is in equilibrium under the action of three forces. F1 = (10i) N, F2 = (-4i + 3j) N. The third force F3 must be…

A. (-6i - 3j) N ✓
B. (6i + 3j) N
C. (-14i - 3j) N
D. (14i + 3j) N
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nmdcat.online AA Physics
Jun 25, 2026

A vector has a magnitude of 100 units. Its component along the y-axis is 50 units. The angle it makes with the x-axis is either 30° or…

A. 120°
B. 150° ✓
C. 210°
D. 330°
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nmdcat.online AA Physics
Jun 25, 2026

A force F1 has components (10, 20). A force F2 is added such that the resultant is (0, 30). The components of F2 must be…

A. (10, 10)
B. (-10, 10) ✓
C. (10, 50)
D. (-10, 50)
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nmdcat.online AA Physics
Jun 25, 2026

A vector A makes an angle of 30° with the x-axis. A vector B makes an angle of 120° with the x-axis. If both have magnitude F, the magnitude of their resultant is…

A. 2F
B. F
C. √2 F ✓
D. √3 F
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nmdcat.online AA Physics
Jun 25, 2026

The magnitude of the resultant vector from the previous question is…

A. 3
B. 6
C. 2√3 ✓
D. 2
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nmdcat.online AA Physics
Jun 25, 2026

The direction of the resultant vector from the previous question is…

A. 45°
B. 135°
C. 225° ✓
D. 315°
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nmdcat.online AA Physics
Jun 25, 2026

The resultant of vector A=10 units at 270° and B=10 units at 180° has a magnitude of…

A. 0 units
B. 10 units
C. 20 units
D. 14.1 units ✓
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nmdcat.online AA Physics
Jun 25, 2026
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