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				| 1. | The force required to tow a vehicle at constant velocity is directly proportional to the magnitude of velocity raised to the first power. It requires 1000 W to tow with a velocity of 10 m/s. How much power is required to tow at a velocity of 8 m/s? | 
| A. | 320 W | 
| B. | 640 W | 
| C. | 160 W | 
| D. | 80 W | 
| Answer» C. 160 W | |