Physics for Scientists and Engineers: A Strategic Approach 5th Edition · Fluids and Elasticity · Problem Challenge_Problem_75
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Randall D. Knight — Fluids and Elasticity: Problem Challenge_Problem_75
Disk brakes, such as those in your car, operate by using pressurized oil to push outward on a piston. The piston, in turn, presses brake pads against a spinning rotor or wheel, as seen in FIGURE CP14.75. Consider a 15 kg industrial grinding wheel, 26 cm in diameter, spinning at 900 rpm. The brake pads are actuated by 2.0-cm-diameter pistons, and they contact the wheel an average distance 12 cm from the axis. If the coefficient of kinetic friction between the brake pad and the wheel is 0.60, what oil pressure is needed to stop the wheel in 5.0 s?
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주어진 조건: , in, 15 kg, 26 cm, 900 rpm, 12 cm
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Physics for Scientists and Engineers: A Strategic Approach · 5th Edition
저자: Randall D. Knight
출판사: Pearson
단원: Fluids and Elasticity