Lift Up The Bags

As we learned in physics class, balancing out weight distribution over the body is important in order to maintain balance. The same can be said when it comes to carrying or lifting up a backpack when rested upon one shoulder. When putting a heavy backpack on one shoulder, your body compensates that weight by lifting the opposite shoulder up. As seen in the pictures of my Dad on our past summer trip to Italy, their shoulders were semi leaning so as to compensate for the weight of their backpacks. The weight distribution resting upon each shoulder is different, so the body must compensate for this difference by shifting and altering the shoulder levels.

Open The Door With Torque

On most household doors, there are two points of torque. One with the turning of the handle to open and release the door and also the points of torque on the hinges which allow the door to move and open. While visiting Rome this past summer, the Roman Forum had many old but well maintained buildings which were used in old roman times as their democratic center. One of the buildings which I took a picture of had these large metal doors which were the originals (over 1000 years old)! They only however had one point of torque because the handle was only a pull handle so there was no torque at that point. On these doors, the point of torque was only on its hinges. As you can see though, as Mr. Kohara explained in class, the handles of the doors are placed on the opposite side of its hinges, so as to increase its lever arm distance, thus increasing its efficiency!