I don't understand a sample problem in Dynamics Beer

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The discussion revolves around a user's confusion regarding sample problem 13.5 from "Vector Mechanics for Engineers" by Beer, specifically the assignment of the value aC=-1/2aD in part b. The user seeks clarification but is advised to provide more context about the problem itself. Additionally, forum members suggest posting in a dedicated homework forum and using the provided template for better assistance. The thread concludes with a closure, indicating that no further responses will be entertained. This highlights the importance of following forum guidelines for effective communication.
Alexanddros81
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Hi!
I am new to this forum and i have problem understanding sample problem 13.5 from Vector Mechanics for Engineers 10th edition Statics and dynamics. (Beer)
In particular I don't understant how in part b assigns the value aC=-1/2aD

If anyone can help
thanks
 

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We don't have every possible technical book immediately available for reference - please tell us yourself what the actual problem is .
 
I have scanned the page with the sample problem and i attached it
 
You need to post in one of the homework forums and fill the template found there (without neglecting the attempt at a solution).

Thread closed.
 
For simple comparison, I think the same thought process can be followed as a block slides down a hill, - for block down hill, simple starting PE of mgh to final max KE 0.5mv^2 - comparing PE1 to max KE2 would result in finding the work friction did through the process. efficiency is just 100*KE2/PE1. If a mousetrap car travels along a flat surface, a starting PE of 0.5 k th^2 can be measured and maximum velocity of the car can also be measured. If energy efficiency is defined by...

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