Forces & Terminal Velocity Quiz
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5 questions, one answer each
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1. What happens to drag on an object as its speed through a fluid increases?
- A. A. Drag decreases
- B. B. Drag stays the same
- C. C. Drag increases
- D. D. Drag becomes zero
2. At terminal velocity, what is true of the resultant force on a falling object?
- A. A. It is at a maximum
- B. B. It is zero
- C. C. It equals the object's weight
- D. D. It equals the drag force only
3. How does opening a parachute change a skydiver's terminal velocity, and why?
- A. A. Increases it, because drag decreases
- B. B. Decreases it, because drag increases
- C. C. Increases it, because weight increases
- D. D. Has no effect on terminal velocity
4. On a velocity-time graph for an object falling to terminal velocity, what does the gradient represent, and how does it change?
- A. A. Distance travelled; it stays constant
- B. B. Acceleration; it decreases and becomes zero at terminal velocity
- C. C. Drag force; it increases throughout
- D. D. Weight; it decreases to zero
5. A cyclist crouches low to reduce their body's frontal profile while racing. Which effect does this streamlining have?
- A. A. It decreases their maximum speed
- B. B. It has no effect on drag or speed
- C. C. It reduces drag, increasing their maximum speed
- D. D. It increases weight, increasing terminal velocity