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22. A 5.20 kg block sliding at 9.40 mfs across a horizontal frictionless surface collides head on with a stationary 8.50 kg block. The 5.20

22. A 5.20 kg block sliding at 9.40 mfs across a horizontal frictionless surface collides head on with a stationary 8.50 kg block. The 5.20 kg block rebounds at 1.80 m/s. How much kinetic energy is lost during this collision? [A 7 marks]

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