click below
click below
Normal Size Small Size show me how
Chapter 5 Vocab.
Term | Definition |
---|---|
Work | The transfer of energy that occurs when a force makes an object move. |
Power | The amount of work done in one second. |
Machine | A device that makes doing work easier. |
Input force | The force that is applied to the machine. |
Output force | The force applied by the machine. |
Mechanical advantage | The ratio of the output force to the input force. |
Efficiency | A measure of how much of the work put into a machine is changed into useful output work by the machine. |
Simple Machine | A machine that does work with only one movement of the machine. |
Lever | A bar that is free to pivot or turn around a fixed point. |
Pulley | A grooved wheel with a rope, chain, or cable running along the groove. |
Wheel and Axle | Simple machine that consists of a shaft or axle attached to the center of a larger wheel, so that the shaft and the wheel rotate together. |
Inclined Plane | Simple machine that consists of a sloping surface, such as a ramp, that reduces the amount of force needed to left something by increasing the distance over which the force is applied. |
Screw | Simple machine that consists of an inclined plane wrapped in a spiral around a cylindrical post. |
Wedge | Simple machine that is an inclined plane with one or two sloping sides. |
Compound Machine | Machine that is a combination of two or more simple machines. |