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Practice Questions

The resultant of three vectors of magnitude 3, 4, and 5 can be zero if they are arranged…

A. along the sides of a right-angled triangle ✓
B. along a straight line
C. in any random direction
D. It is not possible for the resultant to be zero
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nmdcat.online AA Physics
Jun 25, 2026

The magnitude of the resultant force from the previous two questions (Rx=-10, Ry=-20) is approximately…

A. 30.0 N
B. 10.0 N
C. 22.4 N ✓
D. 15.0 N
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nmdcat.online AA Physics
Jun 25, 2026

The y-component of the resultant of the forces in the previous question is…

A. -10 N
B. -20 N ✓
C. -30 N
D. 10 N
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nmdcat.online AA Physics
Jun 25, 2026

A force F1 is 20 N at 270°. A force F2 is 10 N at 180°. The x-component of their resultant is…

A. -10 N ✓
B. -20 N
C. 10 N
D. 30 N
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nmdcat.online AA Physics
Jun 25, 2026

If the resultant of two vectors is to have the maximum possible magnitude, the angle between them must be…

A. 180°
B. 90°
C. 45°
D. 0° ✓
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nmdcat.online AA Physics
Jun 25, 2026

A vector has a magnitude of 13 units and its x-component is -5 units. Its y-component could be…

A. 12 units ✓
B. 8 units
C. 18 units
D. 144 units
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nmdcat.online AA Physics
Jun 25, 2026

A man walks 6 m East, then 6 m North. His resultant displacement vector can be described as having a magnitude of…

A. 12 m
B. 6 m
C. 6√2 m ✓
D. 0 m
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nmdcat.online AA Physics
Jun 25, 2026

A displacement vector D1 is 10 m North. A displacement vector D2 is 20 m at 30° East of North. The x-component of the resultant displacement is…

A. 10 m ✓
B. 17.3 m
C. 20 m
D. 30 m
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nmdcat.online AA Physics
Jun 25, 2026

If vector A = (6i – 8j), then the vector B = -A/2 is…

A. (-3i + 4j) ✓
B. (3i - 4j)
C. (-12i + 16j)
D. (12i - 16j)
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nmdcat.online AA Physics
Jun 25, 2026

A boat moves with velocity (4i + 3j) m/s relative to the water, and the water moves with velocity (1i + 0j) m/s relative to the ground. The boat’s velocity relative to the ground is…

A. (4i + 4j) m/s
B. (3i + 3j) m/s
C. (5i + 3j) m/s ✓
D. (5i + 4j) m/s
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nmdcat.online AA Physics
Jun 25, 2026
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