A friend claims that her car can accelerate from a stop to 60 mi/h (26.8 m/s) in 7.5 s, but the speedometer is broken. You decide to test her claim by riding with her, and you bring along a small metal washer, a short length of string, a protractor, and a pen that can write on glass. Sitting in the passenger seat, you tie the washer to one end of the string and then let the string-washer combination hang straight down by rolling up the passenger-door window to pinch the free end of the string. While the car is stationary, you draw a line on the window alongside the vertical string. Review How large is the angle the string makes with the line you drew if the car accelerates at the rate your friend claims? 0= Submit Part B W V ΑΣΦ 5 Request Answer 11 of 22 ? If an identical washer does not slide on the horizontal dashboard while this is happening, what is the ratio of the frictional force to the gravitational force exerted on this washer?

A friend claims that her car can accelerate from a stop to 60 mi/h (26.8 m/s) in 7.5 s, but the speedometer is broken. You decide to test her claim by riding with her, and you bring along a small metal washer, a short length of string, a protractor, and a pen that can write on glass. Sitting in the passenger seat, you tie the washer to one end of the string and then let the string-washer combination hang straight down by rolling up the passenger-door window to pinch the free end of the string. While the car is stationary, you draw a line on the window alongside the vertical string. Review How large is the angle the string makes with the line you drew if the car accelerates at the rate your friend claims? 0= Submit Part B W V ΑΣΦ 5 Request Answer 11 of 22 ? If an identical washer does not slide on the horizontal dashboard while this is happening, what is the ratio of the frictional force to the gravitational force exerted on this washer?

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter6: Motion In Two Dimensions

Section6.3: Relative Velocity

Problem 27PP

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