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4. Two masses of 3 kg and 5 kg collide head-on, the former moving to the right with the speed 5 m/s and the

4. Two masses of 3 kg and 5 kg collide head-on, the former moving to the right with the speed 5 m/s and the latter moving to the left with the speed 3 m/s. After collision they stick together. What amount of mechanical energy is lost? 5. A cylinder with a uniform density is rolling over a plane. What fraction of its kinetic energy is rotational kinetic energy?

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4 To calculate the amount of mechanical energy lost in the collision between the two masses we can use the principle of conservation of mechanical ene... blur-text-image

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