WHY: We are making models of hands to appreciate the biomechanics of force in the hand where the force is generated far from where it is applied.
H: Tell me how it was built, be sure to include a picture of the sketches we did. Materials:
O: I noticed that the straw hand moved really rigidly but it still was a good model of how hands moved. There wasn’t much difficulty putting the straw hand together besides putting the glove on because the straws needed a lot of space. While we were using it, we found problems with the strings because they would slip out of the slits on the straw and the string attached to the rings would loosen and come off as well. We found a solution to the strings coming out of the slit by taping the string to the straw. We didn’t do much about the knots becoming undone on the rings besides re-knotting them. D: N/A A: I believe that having tighter and bigger knots would have made the model work better. It would work better because we had problems with the strings staying on the straws and the rings. I didn’t see much of a flaw in the process of making the straw hand. I thought it was really straightforward and there wasn’t much confusion in making it. Additional Questions: 1) What makes the hand unique? I feel like the hand is unique because it is a simple way to show how a hand works and we used materials that could be acquired around the house and didn’t cost much. 2) What other parts of the body might use a system similar to the hand? I believe that the foot would use a similar concept as the hand. 3) What machines that you know of might use a similar mechanic and describe how they are similar to the hand? I believe that a toy claw machine would use similar mechanics as a hand because it would have use the same motions to grab the toys. It has to open up and close to grab the toy in the machine.
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