Projectile motion and resistive forces Quiz
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5 questions, one answer each
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1. One ball is dropped from a table and an identical ball is thrown horizontally from the same height at the same instant. Ignoring air resistance, which statement is correct?
- A. The dropped ball lands first.
- B. The thrown ball lands first.
- C. They land at the same time.
- D. It depends on the mass of the balls.
2. A ball rolls off a table with a horizontal speed of 8.0 m s⁻¹ and falls 20 m. Ignoring air resistance, how far does it land from the base of the table?
- A. 16 m
- B. 33 m
- C. 8.0 m
- D. 20 m
3. A ball is falling at its terminal speed. Which statement is correct?
- A. The weight is greater than the drag.
- B. The drag is greater than the weight.
- C. The ball is accelerating at g.
- D. The drag equals the weight, so the resultant force is zero.
4. Compared with the same launch in a vacuum, which is true of a ball moving through air?
- A. It reaches a greater height.
- B. Its horizontal velocity decreases during the flight.
- C. Its path is a symmetrical parabola.
- D. Its acceleration is always g downwards.
5. A car has a fixed engine force. Which change would increase its maximum speed?
- A. Fitting a roof box
- B. Increasing the frontal area
- C. Streamlining the body
- D. Reducing the tyre pressure