What is the amount of the second mass in kg

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A mass of 10 kg is moving at 6.6 m/s in the positive x direction and collides in a perfectly elastic collision with a second mass which is not at rest. After the collision, the second mass is moving at 14 m/s in the +x direction. If the 10 kg mass stops after the collision, what is the amount of the second mass in kg?

Reference no: EM131727481

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