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JAMB Physics 1985 Question 6

Question 6

Motion

If a car starts from rest and moves with a uniform acceleration of 10 m s−2 for ten seconds, the distance it covers in the last one second of its motion is

  1. A.95 m
  2. B.100 m
  3. C.500 m
  4. D.905 m
  5. E.1000 m
Show the answer and explanation

Answer: A (95 m)

Explanation

Distance in 10 s = ½ × 10 × 10² = 500 m; in 9 s = ½ × 10 × 9² = 405 m. The last second covers 500 − 405 = 95 m.