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JAMB Physics 1982 Question 13

Question 13

Motion

A mango fruit drops from a branch 10 m above the ground. Just before hiting the ground its velocity is (g = 10 m s−2).

  1. A.10√2 m s−1
  2. B.10/√2 m s−1
  3. C.100 m s−1
  4. D.5√2 m s−1
  5. E.200 m s−1.
Show the answer and explanation

Answer: A (10√2 m s−1)

Explanation

v² = u² + 2gh = 0 + 2 × 10 × 10 = 200, so v = √200 = 10√2 m s−1.