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Unilorin Post-UTME Physics 2023 (Model questions) Question 2

Question 2

Motion

Which of the following statement about projectile motion is correct?

  1. A.the horizontal component of velocity remains constant throughout the motion
  2. B.the vertical acceleration is zero during the entire motion
  3. C.the range of a projectile depends only on its initial speed
  4. D.the time of flight depends on the angle of projection but not on the initial speed
Show the answer and explanation

Answer: A (the horizontal component of velocity remains constant throughout the motion)

Explanation

With no air resistance there is no horizontal force, so the horizontal velocity stays constant. Gravity acts vertically, and range and time of flight depend on both speed and angle.