Jon draws two force diagrams because he is solving for Chris' mass. However, he could have only drawn one diagram using Chris as the object of interest because he did nothing with the information found when the ball was the object of interest.
2. Will the calculation in the box produce the correct answer for the mass of Chris? How do you know?
If Chris' mass is 196 kg then yes it works out. The answer sounds reasonable and the reason i know this is because i checked math out with a calculator.
3. What mistake (or mistakes) can you find in this work? What effect does each mistake have on the solution, if any? What does Jon need to understand in order to fix the mistake?
I'm pretty sure that there are not any mistakes on Jon's work.
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ReplyDeleteBased on this work, you do not have a realistic expectation of how much work you need to do in order to address this assignment. For a start, you will need to solve the problem for yourself before you can evaluate Jon's work.
ReplyDeleteFor more information, see the email I sent you today titled "Your 12/18 physics journal entry". Grade=2/4 Incomplete