Help with whole page pls Name Tutorial section Tutorials Homework Torque C. Here

Question

Help with whole page pls Name Tutorial section Tutorials Homework Torque C. Here's how two different students approached A. as far from the pivot in order part sit twice Elizabeth since the lite brother is halfas her sister he must the to "compensate" for his lower heavy as instead of 3 feet. pivot. Here, and weight-6 from the pounds the formula torque, r-Fr, where Fis force and ris distance Fi "60 relevant forces for the weights of the children acting on the are "30 pounds. The big sister sits 3 feet from the we're solving for rh. The torques plugged in the numbers to get (60 pounds) feet) "Oo pounds) r, and solved for to get 6 feet. got the same answer. Didone (or both) of them get lucky, or are both kinds of reasoning valid? Explain. 2. Are Jill and Elizabeth's reasoning fundamentally fundamentally different, or a mix of those two the same, extremes? Explain. Ill. Screwdriver You need to loosen a really stuck screw. You have a choice between two screwdrivers, both of which you can grip very well. The only difference is that one of them, the bottom one of these drawings, has a thicker handle than the other. From your experience, will one screwdriver be better than the other to use to loosen a very tight screw? What is the physics explanation for your answer? o University of Maryland Physics Education Research Group, Fall 2006.

Explanation / Answer

1.- Elizabeth applied logic to determine the minimum distance required for the torque force are equivalent at both sides. The student mentally compute the distance noting that the weight of the sister is twice the brother.

2.- The reasoning are fundamentally the same.

III.- Screwdriver:

Because of torque equation, they are the same, due to torque just depend of the Force F and the displacement r.

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