Tuesday, March 29, 2011

;Wheel and Axle!

On Thursday, we learned how wedges and levers work. The distance of the threads, and how big or small the wheel is, will determine the MA. If the threads are further apart it can lift more and then it would be a higher MA. The best is far-apart threads and a big wheel.

wheel and axel

the radius of the wheel and the diameter of the screw affect how much work is needed to be done, when the radius of the wheel is increased the force needed to lift the gate is less but when the radius of the wheel is decreased the force needed increases that is the same with the screw. the mechanical andvantage is the best when the screw and wheel is at its largest.

St. Patricks day

I don't believe in lepricons or the gold at the end of the rainbow, I also dont' think they usesimple machines or wedges. The input force effected the output force because if you use more input force you will have a greater output force, and same with the input distance and output distance. The shorter wedge was harder to use because i takes alot more force becuase it is not as sharp as the longer one. With the lever I noticed that the closer you were to the fulcrum it was easier, and harder if it was farther away.