Simple Machines
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14 terms
Terms | Definitions |
|---|---|
 machine | any device, either fixed or moving, that helps in accomplishing a task |
| force | a push or pull that acts on an object to initiate or change its motion or to cause deformation |
| effort force | an input force; imparting energy into a machine or system |
| load | the weight of an object that needs to be moved or resistance that a mechanical device must overcome to accomplish a task |
| work | the amount of energy that is transmitted to or removed from an object by the action of a force through a distance |
| power | rate of work with respect to time |
| energy | a measure of the ability of an object to effect change in itself or the environment. It is a measure of the capacity for doing work (Units: Newton-meter = Joules) |
| Conservation of Energy | energy can be neither created nor detsroyed, only altered in form |
| mechanical advantage | the ratio of the output force produced by a machine to the input force that is applied to the machine. Ratio that measures the degree to which a simple machine makes a job easier. |
| Ideal Mechanical Advantage | distance moved by effort in the direction of effort DIVIDED BY distance moved by resistance in direction opposite resistance |
| friction | a type of resistance force that results when two objects move against each other |
| Actual Mechanical Advantage | resistance/ effort |
| efficiency | a measure of how close to "perfect" something is. (e = AMA/IMA) |
| torque | a measure of the twisting action of a force |
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