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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?

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? Correct Answer 640 W

Since force is directly proportional to velocity, the power required will be directly proportional to the square of the velocity. Power = Force x Velocity Hence, power is a multiple of 82 and an integer such that; 1000/102 = P/82 P = 640 W.

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