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JAMB Physics 1992 Question 3

Question 3

Motion

A boy sits in a train moving with uniform speed on a straight track. If from his outstretched palm he gently tosses a coin vertically upwards, the coin will fall

  1. A.in front of his palm
  2. B.behind his palm
  3. C.beside his palm
  4. D.into his palm
Show the answer and explanation

Answer: D (into his palm)

Explanation

The coin already shares the train's horizontal velocity, and nothing changes it while it is in the air, so it keeps pace with the boy and lands back in his palm.