To keep the car moving at a constant speed neglect rolling, Mechanical Engineering

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To keep the car moving at a constant speed neglect rolling

A loaded railroad car has a mass of 30 Mg and is supported by eight 800-mm-diameter wheels with 125-mm-diameter axles. Knowing that the coefficients of friction are µs = 0.020 and µk =0.015, determine the horizontal force required

(a) to start the car moving,

(b) to keep the car moving at a constant speed. Neglect rolling resistance between the wheels and the track.

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Mechanical Engineering: To keep the car moving at a constant speed neglect rolling

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Mechanical Engineering: To keep the car moving at a constant speed neglect rolling

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