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Question 30255
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Laws of Motion and Friction: Pulley — Two Masses Vertical MCQ

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Pulley — Two Masses VerticalHardQuestion 30255

Question

Masses of 4 kg and 8 kg hang from a string over a frictionless pulley. When the system is released, the 8 kg mass falls with:
  1. A
    g/3 = 3.33 m/s²
    Correct
  2. B
    g/4 = 2.5 m/s²
  3. C
    g = 10 m/s²
  4. D
    g/2 = 5 m/s²

Correct answer

g/3 = 3.33 m/s²

Explanation

a = (8−4)g/(8+4) = 4×10/12 = 40/12 = 3.33 m/s².

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