| A | B |
|---|
| work | the product of the force and the distance moved by the force |
| what is the equation for work? | w=fd |
| power | the time rate of work |
| what is the equation for power? | work/time |
| What do changes in motion depend on? | force/ how long the force acts |
| mechanical energy | energy due to the position of something or movement of something |
| potential energy | the energy that something possesses because of its position |
| kinetic energy | energy in motion, quantified by the relationship |
| what is the equation for kinetic energy? | KE=1/2 mv 2 |
| work-energy thereom | the work done on an object equals the change in kinetic energy of the object |
| what is the equation for work-energy thereom? | work=(triangle)KE |
| conservation of energy | energy can be created or destroyed |
| machine | a device, such as a lever or pulley, that increases or decreases a force or simply changes the direction of the force |
| conservation of energy for machines | the work output of any machine cannot exceed the work input |
| what is the equation for the conservation of energy for machines? | work input=work output |
| lever | a simple machine consisting of a rigid rod pivoted at a fixed point called the fulcrum |
| efficiency | the percentage of the work put into a machine that is converted into useful work input |
| micro | .000001 |
| milli | .001 |
| centi | .01 |
| deci | .1 |
| deka | 10 |
| hecto | 100 |
| kilo | 1000 |
| mega | 1,000,000 |
| what is the order of the conversion chart? | micro, --, --, milli, centi, deci, BASE, deka, hecto, kilo, --, --, mega |
| energy | on of the most central concepts to science |
| Where does energy come from? | the sun |
| what is the equation for impulse? | I=ft |
| where are some places that energy is found | a drawn bow and arrow/ fossil fuels/ food/ batteries |
| what is the equation for potential energy | PE=mgh |
| what is the equation for kinetic energy? | KE=1/2 mv 2 |
| If the speed of an object is doubled, what happens to the KE? | it quadruples it |
