S т а М 0о

University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter2: Vectors
Section: Chapter Questions
Problem 21CQ: What is wrong with the following expressions? How can you correct them? (a) C=AB , (b) C=AB , (c)...
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While hauling a log in the back of a flatbed truck, a driver is pulled over by the state police. Although the log cannot roll sideways, the police claim that the log could have slid out the back of the truck when accelerating from rest. The driver claims that the truck could not possibly accelerate at the level needed to achieve such an effect. Regardless, the police write a ticket, and the driver's court date is approaching.

The log has a mass of ?=879 kg;m=879 kg; the truck has a mass of ?=9750 kg.M=9750 kg. According to the truck manufacturer, the truck can accelerate from 0 to 55 mph55 mph in 24.0 s,24.0 s, but this does not account for the additional mass of the log. Calculate the minimum coefficient of static friction ?sμs needed to keep the log in the back of the truck.

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