Thursday, February 16, 2012

Blog #3 -Levers,Wheel + Axle,Pulley



In my S.T.E.M class we learned about 3 very important simple machines. The first simple machine is a lever. It helps lift items and makes work easier. The fulcrum is the middle, the effort and the load is the sides of the lever. On my diagram I made a hammer pulling up a nail, the part by the nail the load, the middle the fulcrum, and the handle the load.

Second simple machine is a pulley. A
pulley is also used to lift things and to make work easier. What a pulley is is a wheel with a rope raped around it and connected to the item you want to lift, and the other end or the rope is you pulling on it to lift the object. The object you are lifting is the load, you are the effort or whatever is pulling the pulley, and the fulcrum is the sinter of the actual wheel/pull. One important thing about the pulley is is that however many pulleys you have x2 that’s how much rope you need to pull to move it up. On my diagram I’ve shown this but with a person pulling up a heavy weight but the person is using a pulley.

Our last simple machine is a wheel and axle. The W and A is a wheel going around an axle. Notice that the wheel doesn’t have to be a circle it can be a square or rectangle but as long as it can move around the axle. There is no effort or load on the W and A but there is a fulcrum, and it is the middle or axle. On my diagram I have show a steering wheel, the wheel the wheel and the part connected to it the axle.

1 comment:

  1. Way to explain all of the different machines you included a lot of information that was in to movie. I think your drawlings were a little small and you should have made them bigger.

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