Question
Explain any difference between the values for the coefficients of static and sliding friction.3. Using the data in Table 2, calculate the coefficient of sliding
Explain any difference between the values for the coefficients of static and sliding friction.3. Using the data in Table 2, calculate the coefficient of sliding friction. Show your work.4. Are your values for sliding from Questions 1 and 3 equal? Explain any differences.5. A brick is positioned first with its largest surface in contact with an inclined plane. The plane is tilted at an angle to the horizontal until the brick just begins to slide, and the angle, 0, of theplane with the honzontal is measured. Then the brick is turned on one of its narrow edges, the plane is tilted, and o is again measured. Predict whether there will be a difference in these measured angles. Explain your answer in terms of the eguation for the force of friction. Is the coefficient of static friction affected by the area of contact between the surfaces:6. A brick is placed on an inclined plane, which is tilted at an angle to the horizontal until the brick just begins to slide. The angle, O, of the plane with respect to the horizontal is measured. Then the brick is wrapped in waxed paper and placed on a plane. The plane is tilted, and 0 is again measured. Predict whether there will be a difference in these measured angles. Explain.7. From your answers to the previous two questions, determine the factors that influence the force of friction.ApplicationWhile looking for a set of new tires for your car, you find an advertisement that offers two brands of tires, brand X and brand Y, at the same price. Brand X has a coefficient of friction on dry pavement of 0.90 and on wet pavement of 0.15. Brand Y has a coefficient of friction on dry pavement of 0.88 and on wet pavement of 0.45. If you live in an area with high levels of precipitation, which tire would give you better service? Explain.ExtensionUsing another object, measure its weight and the force necessary to pull it along a horizontal surface at a constant speed. Record the information in a data table similar to Table 2. Calculate thecoefficient or sliding friction. Since u = tan 0, find the angle 0. Estimate the angle at which sliding ata constant speed would begin. Using this as your prediction, slowly raise the flat board while lightly tapping the object. Record the angle at which the object begins sliding at a constant speed.Compare your prediction to your experimental results.
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