A stationary object of mass 4kg is set in motion by a net force of 5ON. If the object attains is speed of 5ms-1 in time. Calculate the value of t.

  • A 0.20s
  • B 0.40s
  • C 0.63s
  • D 0.80s
  • E 1.30s
waec 1996physics

The correct answer is B. 0.40s

F = ma = MV/t ∴ t = MV/F = 20/50 = 0.40s

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