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JAMB Physics 2009 Question 1

Question 1

Gravitational Field

The values of x, y and z respectively in the expression MxLyTz for the universal gravitational constant G are

  1. A.2, −3, −2.
  2. B.−1, 3, −2.
  3. C.−1, 2, −3.
  4. D.−2, −1, 3.
Show the answer and explanation

Answer: B (−1, 3, −2.)

Explanation

From F = Gm1m2/r2, G = Fr2/m2 = (MLT−2)(L2) ÷ M2 = M−1L3T−2. So x = −1, y = 3, z = −2.