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6. A 0.06 kg tennis ball, moving with a speed of 7.5 m/s, has a head on collision with a 0.09 kg ball initially moving

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6. A 0.06 kg tennis ball, moving with a speed of 7.5 m/s, has a head on collision with a 0.09 kg ball initially moving away from it at a speed of 3.0 m/s. Assuming a perfectly elastic collision, what is the speed and direction of each ball after the collision? (Ans: 2.3 m/s; 6.8 m/s) t 2010

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