1. Why does Jon draw two force diagrams? Does he need two force diagrams to answer this question?
Jon does need to force diagrams to figure out this problem because he must figure out the force of Chris on the ball with the ball as the object of interest so that he could figure out the force of the ball on chris when chris is the object of interest.
2. Will the calculation in the box produce the correct answer for the mass of Chris? How do you know?
When I calculated out the mass of Chris, I dot 173.5 kg, not 196 kg.
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 found Chris to weigh 173.5 kg because Jon divided by the force of the gravitational pull, not taking into account that acceleration is equal to Fnet over mass. In order to find the mass, you have to subrract the 8 kg of the ball from the mass and set the mass equal to x and solve it out that way.
This is good work but you've missed one of the important parts of the solution.
ReplyDeleteIf you want to earn another point on this assignment, solve the problem and bring your solution to office hours to explain it to me, then explain Jon's errors in a new post on your blog, before Wednesday at 12pm.
Grade =3/4