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Motion and Forces
Unit 2 1-3
Term | Definition |
---|---|
Work | Is the use of force to move an object some distance in the direction of the force. |
Energy | Is the ability to do work. |
Power | Is the rate at which work is done. |
Kinetic energy | Is the energy of motion. |
Potential energy | Is the energy an object has because of its position, condition, or chemical composition. |
Mechanical energy | Is the energy possessed by an abject due to its motion and position. |
Machine | Is any device that helps people do work by changing the way work is done. |
Mechanical advantage | Is the number of times the machine multiplies the input force. |
Mechanical efficiency | Is a comparison of machine's work output with the work input. |
Lever | Is a simple machine that has a bar that pivots at a fixed point. |
Fulcrum | A fixed point. |
Wheel and axle | Is a simple machine that is made of a wheel connected to a smaller cylindrical object, the axle. |
Pulley | Is a simple machine that has a grooved wheel that holds a rope or a cable. |
Inclined plane | Is a simple machine that is straight, slanted surface. |