Projectile motion Quiz
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5 questions, one answer each
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1. A ball is thrown horizontally from a cliff. Which statement about its horizontal velocity is correct (ignoring air resistance)?
- A. It increases
- B. It decreases
- C. It stays constant
- D. It is zero at the highest point only
2. A stone is thrown horizontally at 6.0 m s⁻¹ from a bridge 10 m above water. Taking g = 9.81 m s⁻², how long does it take to hit the water?
- A. 1.4 s
- B. 2.0 s
- C. 0.60 s
- D. 1.7 s
3. A ball is kicked at 15 m s⁻¹ at 40° above the horizontal. What is its initial horizontal component of velocity?
- A. 9.6 m s⁻¹
- B. 15 m s⁻¹
- C. 11.5 m s⁻¹
- D. 12 m s⁻¹
4. What is the velocity of a projectile at its highest point, when it was launched at an angle?
- A. Zero
- B. Vertical only
- C. Equal to the launch velocity
- D. Horizontal only
5. A ball dropped from a height h and another projected horizontally from height h land after times t₁ and t₂. Which is true?
- A. t₁ > t₂
- B. t₁ = t₂
- C. t₁ < t₂
- D. It depends on the horizontal speed