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Physics chapter 5 ex
| Question | Answer |
|---|---|
| in order for work to be done a force must make something | move |
| two conditions for work to be done | object must move the movement must be in the same direction as the applied force |
| when work is done what happens | transfer of energy |
| when you do work on an object you increase its | energy |
| when youlift an object up you... | increase its potential energy |
| when you push an object you ... | increase its kinetic energy |
| the amount of work donein one second | power |
| device that makes doing work easier | machine |
| machines make work easier 2 ways: | increasing force and increasing distance over which the force is applied |
| no firiction | ideal mechanical advantage |
| a measure of how much work a machine does that can be changed into useful output work | efficency |
| a machine that does work with only one movement of the machien | simple machine |
| 6 types of simple machines | leer pulley wheel and axle screw wedge inclined plane |
| a grooved wheel with a rope or chain running along the groove | pulley |
| a system of pulleys | block and tackle |
| consist of shaft or axle attached to larger wheel so the wheel and axle rotate together | wheel and axle |
| a sloping surface such as a ramp tha reduces the amount of force required to do work | inclined plane |
| an inclined plane wrapped in a spiral around a cylindrical post | the screw |
| a inclined plane with one or two sloping sides it changes directions of input force | wedge |
| two or more simple machines working together | compound machine |
| imperdance of the motion of change through a conductor | resistance |
| black | black |
| bunnies | brown |
| ride | red |
| on | orange |
| yellow | yellow |
| gates | green |
| because | blue |
| vince | violet |
| gets | gray |
| winded | white |