Scalars, Vectors and Resultant Forces 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 these is a vector quantity?
- A. A. Speed
- B. B. Mass
- C. C. Velocity
- D. D. Energy
2. Which of these is an example of a non-contact force?
- A. A. Friction
- B. B. Tension
- C. C. Gravitational force
- D. D. Normal contact force
3. Two forces act on a stationary crate: 30 N to the right and 30 N to the left. What can be said about these forces?
- A. A. They are unbalanced and the crate will accelerate
- B. B. They are balanced, giving a resultant force of zero
- C. C. Only one of them is a real force
- D. D. The crate will move left
4. A cyclist pedals forward with a driving force of 250 N while air resistance and friction act backward with a combined 90 N. What is the resultant force?
- A. A. 340 N forward
- B. B. 160 N forward
- C. C. 160 N backward
- D. D. 250 N backward
5. (HT) A boat engine provides a force of 500 N at 30° above the direction of travel through the water. To analyse the boat's forward and sideways motion separately, a student should:
- A. A. Ignore the angle and use 500 N as the forward force
- B. B. Resolve the 500 N force into horizontal and vertical components
- C. C. Double the force to account for the angle
- D. D. Treat the force as a scalar quantity