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Q. A boat moves through the water at 15m/sec. The engine must provide a force of 6x10^3N to keep the boat moving. What power must the motor generate? (Hint-since work is force times distance, power is force times velocity.)

Q. If a car travelling at 30m/s will skid 18.00 m when its brakes lock and the car slides, how far would it skid if it is travelling at 40 m/s when its brakes lock? (This question is typical on some driver's license exams. Note: 10 m/s = 22 mph)

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