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Chapter 5 Vocab. O.S
Sections 1,2, and 3
| Question | Answer |
|---|---|
| Transfer of energy that occurs when a force makes an object move; measured in Joules. | Work |
| Amount of work done, or the amount of energy transferred, divided by the time required to do the work or transfer of energy; measured in Watts (W) | Power |
| Device that makes doing work easier by increasing the force applied to an object, changing the direction of an applied force, or increasing the distance over which a force can be applied. | Machine |
| The force applied to the machine. | Input Force |
| The force applied by the machine. | Output Force |
| (MA) Ratio of the output force exerted by a machine to the input force applied to the machine. | Mechanical Advantage |
| Ratio of the output work done by the machine to the input work done on the machine, expressed as a percentage. | Efficiency |
| Machine that does work with only one movement- lever, pulley, wheel and axle, inclined plane, screw, and wedge. | Simple Machine |
| Simple machine consisting of a bar free to pivot about a fixed point called the fulcrum. | Lever |
| Simple machine that consists of a grooved wheel with a rope, chain, or cable running along the groove; can be either fixed or movable. | Pulley |
| Simple machine that consists of a shaft or axle attached to the center of a larger wheel, so that the shaft and wheel rotate together. | Wheel and Axle |
| Simple machine that consists of a sloping surface, such as a ramp, that reduces the amount of force needed to lift something by increasing the distance over which the force is applied. | Inclined Plane |
| Simple machine that consists of an inclined plane wrapped in a spiral around a cylindrical post. | Screw |
| Simple machine that is an inclined plane with one or two sloping sides. | Wedge |
| Machine that is a combination of two or more simple machines. | Compound Machine |