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a machine that is made of two or more simple machines.

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a simple machine consisting of a grooved wheel that holds a rope or a cable.

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The wheel and axle is one of six simple machines identified by Renaissance scientists drawing from Greek texts on technology. The wheel and axle consists of a wheel attached to a smaller axle so that these two parts rotate together in which a force is transferred from one to the other.

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a simple machine of the inclined plane type consisting of a spirally grooved solid cylinder and a correspondingly grooved hollow cylinder into which it fits.

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A wedge is really an inclined plane turned on its side. But instead of helping you move things to a higher level, a wedge helps you push things apart. The blades of a knife or a shovel are both wedges. A wedge can also be round, like the tip of a nail, or the tines on your fork.

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a simple machine that is straight, slanted surface.

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a simple machine consisting of a bar that pivots at a fixed point, called a fulcrum.

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Mechanical efficiency measures the effectiveness of a machine in transforming the energy and power that is input to the device into an output force and movem

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a number that tells how many times a machine multiplies force.

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work done by a simple machine, compound machine, or any type of engine model. In common terms, it is the energy output, which for simple machines is always less than the energy input, even though the forces may be drastically different.

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work done by a simple machine, compound machine, or any type of engine model. In common terms, it is the energy output, which for simple machines is always less than the energy input, even though the forces may be drastically different.

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a device that helps make work easier by changing the size direction (or both) of a force.

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the unit used to express work and energy.

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The SI derived unit used to measure power, equal to one joule per second.

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the rate at which work is done

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using a force to move an object a distance (when both the force and the motion of the object are in the same direction.)