Forces and Elasticity Quiz
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5 questions, one answer each
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1. Which of the following best describes elastic deformation?
- A. The material returns to its original shape and size when the force is removed
- B. The material permanently changes shape even after the force is removed
- C. The material breaks into smaller pieces when stretched
- D. The material becomes harder and cannot be deformed further
2. What does Hooke's Law state?
- A. The extension of a spring is inversely proportional to the force applied
- B. The extension of a spring is directly proportional to the force applied, provided the limit of proportionality is not exceeded
- C. The force applied to a spring is always equal to the spring constant
- D. Springs always return to their original length regardless of how much force is applied
3. A force–extension graph for a spring shows a straight line from the origin up to 50 N, where it then begins to curve. A force of 30 N produces an extension of 0.15 m. What is the spring constant of this spring?
- A. 4.5 N/m
- B. 200 N/m
- C. 2.0 N/m
- D. 0.005 N/m
4. In an experiment to investigate the relationship between force and extension of a spring, which variable should be kept constant to ensure a fair test?
- A. The extension of the spring
- B. The applied force
- C. The temperature of the spring and the type of spring being used
- D. The initial length of the spring before any force is applied
5. A spring has a spring constant of 400 N/m and is stretched by 0.04 m. Calculate the elastic potential energy stored in the spring. (Higher Tier)
- A. 0.32 J
- B. 3.2 J
- C. 16 J
- D. 0.16 J