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JAMB Physics 1997 Question 5

Question 5

Motion

Two bodies X and Y are projected on the same horizontal plane, with the same initial speed but at angles 30° and 60° respectively to the horizontal. Neglecting air resistance, the ratio of the range of X to that of Y is

  1. A.1 : 1
  2. B.1 : 2
  3. C.√3 : 1
  4. D.1 : √3
Show the answer and explanation

Answer: A (1 : 1)

Explanation

Range R = u2 sin 2θ/g. sin 60° = sin 120°, so both ranges are equal: 1 : 1.