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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 |