passwella.
Menu

JAMB Physics 2007 Question 43

Question 43

Gravitational Field

Two spheres of masses 5.0 kg and 10.0 kg are 0.3 m apart. Calculate the force of attraction between them. [G=6.67 × 10−11 Nm2 kg−2]

  1. A.3.71 × 10−8 N.
  2. B.3.57 × 10−2 N.
  3. C.4.00 × 102 N.
  4. D.3.50 × 10−10 N.
Show the answer and explanation

Answer: A (3.71 × 10−8 N.)

Explanation

F = Gm1m2/r2 = 6.67 × 10−11 × 5 × 10 ÷ 0.09 = 3.71 × 10−8 N.