Sunday, December 14, 2008

Torque


I did not have a working camera this weekend, so i compiled a bunch of pictures i found in my iphoto album that i could identify torque in.  I found this picture of when i went to the seattle space needle this summer.  When i looked through the telescope thing, it was at rest and no torque because there was no rotation.  When i turned it toward the camera, i realized there was torque because i was pushing with my right hand perpendicular to the lever which was from my hand to the center of rotation where the telescope was rotating.  

The picture with Kenji shooting away on the anti-aircraft artillery is similar to the telescope picture.  Although her is applying force to the lever, there is no torque because his force is perpendicular to the lever.  When he turns the gun to shoot the imaginary planes, there is torque because his force is now perpendicular as he applies force from either the left or the right using his left and right hands.  The lever is from his hands to the axle on which the gun is rotating.

Behind the counter of this lovely cabin in the mountains of Washington's Olympic Peninsula, my Aunty is cutting zucchini.  There is torque in her cutting motion as she keeps the tip of the knife on the board and lifts only the back up continuously slicing down on the vegetable.  She applies force with her hand down on the handle.  The handle is the lever from the hand to the tip of the knife which is the center of rotation.  The torque increases as she holds the knife farther from the center of rotation making the zucchini easier to cut.