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2. Simple machine - Wikipedia

   en.wikipedia.org/wiki/Simple_machine

   A compound machine is a machine formed from a set of simple machines connected in series with the output force of one providing the input force to the next. For example, a bench vise consists of a lever (the vise's handle) in series with a screw, and a simple gear train consists of a number of gears ( wheels and axles ) connected in series.

3. Mechanical advantage - Wikipedia

   en.wikipedia.org/wiki/Mechanical_advantage

   The device trades off input forces against movement to obtain a desired amplification in the output force. The model for this is the law of the lever. Machine components designed to manage forces and movement in this way are called mechanisms. [1] An ideal mechanism transmits power without adding to or subtracting from it.

4. Science project - Wikipedia

   en.wikipedia.org/wiki/Science_project

   A science project is an educational activity for students involving experiments or construction of models in one of the science disciplines. Students may present their science project at a science fair, so they may also call it a science fair project. Science projects may be classified into four main types.

5. Inclined plane - Wikipedia

   en.wikipedia.org/wiki/Inclined_plane

   The mechanical advantage of a simple machine as defined as the ratio of the output force exerted on the load to the input force applied. The inclined plane the output load force is just the gravitational force of the load object on the plane, its weight . The input force is the force exerted on the object, parallel to the plane, to move it up ...

6. Mechanical amplifier - Wikipedia

   en.wikipedia.org/wiki/Mechanical_amplifier

   where F A is a force acting on point A on the rigid lever beam, F B is a force acting on point B on the rigid lever beam and a and b are the respective distances from points A and B to the pivot point. If F B is the output force and F A is the input force, then mechanical advantage MA is given by the ratio of output force to input force.

7. Lever - Wikipedia

   en.wikipedia.org/wiki/Lever

   If a and b are distances from the fulcrum to points A and B and the force F A applied to A is the input and the force F B applied at B is the output, the ratio of the velocities of points A and B is given by a/b, so the ratio of the output force to the input force, or mechanical advantage, is given by: = =.