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JAMB Physics 1992 Question 4

Question 4

Motion

A body starts from rest and moves with uniform acceleration of 6 m s−2. What distance does it cover in the third second?

  1. A.15m
  2. B.18m
  3. C.27m
  4. D.30m
Show the answer and explanation

Answer: A (15m)

Explanation

Distance in 3 s = ½ × 6 × 3² = 27 m; in 2 s = ½ × 6 × 2² = 12 m. In the third second it covers 27 − 12 = 15 m.