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THERMODYNAMICS

91 questions found

Practice Questions

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 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 Physics
Jun 25, 2026

Two forces F1 = 8 N at 90° and F2 = 6 N at 180° act on a point. The magnitude of the resultant is…

A. 14 N
B. 2 N
C. 10 N ✓
D. 48 N
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nmdcat.online 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 Physics
Jun 25, 2026

The direction of the resultant force in the previous question is approximately…

A. 127° ✓
B. 143°
C. 37°
D. 53°
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nmdcat.online 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 Physics
Jun 25, 2026

The x-component of the resultant of F1 = 100 N at 30° and F2 = 100 N at 150° is…

A. 0 N ✓
B. 100 N
C. 173.2 N
D. 200 N
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nmdcat.online 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 Physics
Jun 25, 2026

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

A. 0 N
B. 50 N
C. 100 N ✓
D. 200 N
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nmdcat.online 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 Physics
Jun 25, 2026

A vector has an x-component of -25 units and a y-component of 45 units. The tangent of its reference angle is…

A. 25/45
B. -0.555555556
C. 45/25 ✓
D. -1.8
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nmdcat.online Physics
Jun 25, 2026

If the sum of two vectors is perpendicular to their difference, the two vectors must…

A. be perpendicular
B. have the same magnitude ✓
C. be parallel
D. have different magnitudes
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nmdcat.online Physics
Jun 25, 2026

A displacement vector has a magnitude of 100 m and a y-component of 86.6 m. If it lies in the second quadrant, its x-component is…

A. +50 m
B. -50 m ✓
C. +86.6 m
D. -86.6 m
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nmdcat.online Physics
Jun 25, 2026

The resultant of three forces F1=10N East, F2=20N North, and F3=10N West is…

A. 20 N North ✓
B. 40 N
C. 20 N South
D. 0 N
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nmdcat.online Physics
Jun 25, 2026

A vector A has magnitude 12 and is at 60°. Vector B has magnitude 8 and is at 300°. The y-component of their resultant is approximately…

A. 10.4
B. 3.5 ✓
C. 18
D. -6.9
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nmdcat.online Physics
Jun 25, 2026

If the resultant of two forces is zero, the forces must be…

A. perpendicular
B. equal in magnitude and opposite in direction ✓
C. parallel and in the same direction
D. of unequal magnitude
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nmdcat.online Physics
Jun 25, 2026

A vector R has components Rx = 15 and Ry = -20. Its magnitude is…

A. 35
B. 5
C. -5
D. 25 ✓
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nmdcat.online Physics
Jun 25, 2026

The direction of the vector R in the previous question is in the…

A. First Quadrant
B. Second Quadrant
C. Third Quadrant
D. Fourth Quadrant ✓
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nmdcat.online Physics
Jun 25, 2026

To make the resultant of forces F1 = (5i + 5j) N and F2 = (-10i + 5j) N equal to zero, a third force F3 must be…

A. (+5i - 10j) N ✓
B. (-5i + 10j) N
C. (+5i + 10j) N
D. (-5i - 10j) N
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nmdcat.online Physics
Jun 25, 2026
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