Forces & Their Interactions Quiz
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5 questions, one answer each
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1. Which of the following is a non-contact force?
- A. A. Friction
- B. B. Tension
- C. C. Gravity
- D. D. Normal contact force
2. Which of these is a vector quantity?
- A. A. Distance
- B. B. Speed
- C. C. Time
- D. D. Velocity
3. An object has a mass of 5 kg. Given g = 10 N/kg, what is its weight?
- A. A. 0.5 N
- B. B. 5 N
- C. C. 15 N
- D. D. 50 N
4. A spring extends by 4 cm when a 2 N force is applied, obeying Hooke's Law. What extension would a 5 N force produce?
- A. A. 4 cm
- B. B. 8 cm
- C. C. 10 cm
- D. D. 20 cm
5. A rubber band is stretched and, on release, does not return to its original length. What type of distortion has occurred, and why does this matter for the elastic potential energy equation?
- A. A. Elastic distortion; the equation applies normally
- B. B. Inelastic distortion; the object was stretched beyond the limit of proportionality, so E_e = 1/2 k e^2 no longer applies accurately
- C. C. Elastic distortion; the object stored no energy at all
- D. D. Inelastic distortion; weight increased permanently