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Please explain in detail. 6. A car of unknown mass heading west at 6m/s collides with a 3500kg car heading north at 12m/s. What is

Please explain in detail.

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6. A car of unknown mass heading west at 6m/s collides with a 3500kg car heading north at 12m/s. What is the mass of the car if the final speed is 10m/s and the angle is 25 degrees? 7. A 2600kg car heading west at 15m/s collides with a 3500kg car heading north. What is the initial speed of the car if the final speed is 18m/s and the angle is 250

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