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Practice Questions

A force of 10√2 N acts at an angle of 315°. Its components (Fx, Fy) are…

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

To nullify the vector A = (-4i – 6j), one must add the vector…

A. (-4i - 6j)
B. (4i + 6j) ✓
C. (4i - 6j)
D. (-4i + 6j)
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nmdcat.online AA Physics
Jun 25, 2026

A vector of magnitude 8 units lies in the 3rd quadrant, making an angle of 60° with the negative x-axis. Its components are approximately…

A. (-4, -6.9) ✓
B. (-6.9, -4)
C. (4, 6.9)
D. (-6.9, 4)
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nmdcat.online AA Physics
Jun 25, 2026

If Rx = Rcosφ, then φ must be the angle between the vector R and the…

A. y-axis
B. x-axis ✓
C. z-axis
D. origin
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nmdcat.online AA Physics
Jun 25, 2026

Two forces F1=20N at 45° and F2=20N at 135° act on a body. The resultant force vector is…

A. 40j N
B. 28.3j N ✓
C. 20j N
D. 20i N
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nmdcat.online AA Physics
Jun 25, 2026

A person pulls a box with a force of 50 N at an angle of 30° above the horizontal. The effective force pulling the box horizontally is…

A. 25.0 N
B. 50.0 N
C. 43.3 N ✓
D. 30.0 N
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nmdcat.online AA Physics
Jun 25, 2026

A plane flies at 100 m/s East while a crosswind blows at 100 m/s North. The plane’s resultant speed is approximately…

A. 200 m/s
B. 0 m/s
C. 141 m/s ✓
D. 100 m/s
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nmdcat.online AA Physics
Jun 25, 2026

If vector R = A + B, and R = A – B in magnitude, then…

A. B must be a null vector
B. A and B must be perpendicular ✓
C. A must be a null vector
D. A and B must be parallel
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nmdcat.online AA Physics
Jun 25, 2026

A vector has components (1, √3). The angle it makes with the x-axis is…

A. 30°
B. 45°
C. 60° ✓
D. 90°
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nmdcat.online AA Physics
Jun 25, 2026

A force of 10 N acts at 30° and another force of 10 N acts at 150°. The resultant has a magnitude of…

A. 20 N
B. 10 N ✓
C. 0 N
D. 10√3 N
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nmdcat.online AA Physics
Jun 25, 2026
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