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Physics · PYQ NEET UG 2020
हिन्दीTwo particles of mass \( 5\text{ kg} \) and \( 10\text{ kg} \) respectively are attached to the ends of a rigid rod of length \( 1\text{ m} \) with negligible mass. The centre of mass of the system from the \( 5\text{ kg} \) particle is nearly at a distance of:
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Correct answer · Option B
67 cm
Explanation
Distance of COM from \( 5\text{ kg} \) mass is given by \( x_1 = \frac{m_2 L}{m_1 + m_2} = \frac{10 \times 1}{5 + 10} = \frac{10}{15} = \frac{2}{3}\text{ m} \approx 67\text{ cm} \).
