Translations:Adventist Youth Honors Answer Book/Health and Science/Physics/159/en
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- Theory-
- Simple machines are used to create a mechanical advantage. They do this by reducing the amount of force needed to accomplish a job. The list of machines usually includes the following machines
- Inclined plane- It takes less force to push a load up a slope than lift it straight up.
- Wheel and axle- The wheel is arguably the most important machine. It reduces the amount of frictional forces.
- Lever-Is composed of a fulcrum or pivot point and a long rigid bar or beam. The closer the object that we are lifting is to the fulcrum the easier (More mechanical advantage we have.
- Pulley-Is a wheel that is used with a rope to change the direction of a force. Multiple pulleys can be used together to create a block and tackle that will increase the mechanical advantage.
- Wedge-This machine is just two inclined planes, but is usually included because it is so useful.
- Screw-This is simply a circular inclined plane, but because it takes a rotational force and turns it into a linear force, it is almost always included in a list of simple machines.
- Simple machines are used to create a mechanical advantage. They do this by reducing the amount of force needed to accomplish a job. The list of machines usually includes the following machines
