Two blocks of mass 1kg and 2kg are travelling in the opposite direction with velocity of 3m/s and 6 m/s respectively. What is their total kinetic energy (in J) in centre of mass frame of reference ?

Engineering

Physics

Center of Mass

Question

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$K_{C} = \frac{1}{2} {μv}_{rel} = \frac{1}{2} \times \frac{1 \times 2}{1 + 2} \times (3 - (- 6))^{2} = 27 J$

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