A ball is projected horizontally from the top of a tower. Neglecting air resistance, which of the following statements about its motion is/are correct?

I. Vertical acceleration on the ball decreases as it falls

II. The vertical force on the ball remains constant

III. The vertical speed of the ball increases as it falls

  • A Vertical acceleration on the ball decreases as it falls
  • B I only
  • C II only
  • D I and II only
  • E II and III only
waec 2017physics

The correct answer is D. I and II only

The body while coming down is acted upon by acceleration due to gravity, hence, the vertical force is constant. Also, at maximum height, the vertical velocity is 0 and then increases as the body comes downward.

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