Question Detail
Question
Determine the centre of mass of two bodies 2 kg and 1 kg positioned at (-1,3) and (1,2) respectively
Correct Answer
Option D is the correct answer.
Detailed Explanation
x_cm = (m₁x₁ + m₂x₂)/(m₁+m₂) = (2×(-1) + 1×1)/3 = (-2 + 1)/3 = -1/3. y_cm = (2×3 + 1×2)/3 = (6 + 2)/3 = 8/3. So (-1/3, 8/3).
Hint
Centre of mass = (Σm_i r_i) / Σm_i.