Scalars, vectors and equilibrium Quiz
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5 questions, one answer each
Each answer is checked as you go, with why.
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1. Which of the following is a vector quantity?
- A. Speed
- B. Mass
- C. Displacement
- D. Distance
2. Forces of 5.0 N and 12 N act at a point at right angles to each other. What is the magnitude of the resultant?
- A. 7.0 N
- B. 13 N
- C. 17 N
- D. 60 N
3. A force of 50 N acts at 37° above the horizontal. What is its horizontal component?
- A. 30 N
- B. 37 N
- C. 40 N
- D. 50 N
4. Three coplanar forces act on an object that is in equilibrium. Which statement must be true?
- A. The three forces have equal magnitudes.
- B. The three forces act in the same direction.
- C. The object is at rest.
- D. The forces drawn head to tail form a closed triangle.
5. A block of weight 98 N rests on a slope inclined at 25° to the horizontal. What is the component of its weight down the slope?
- A. 41 N
- B. 46 N
- C. 89 N
- D. 98 N