Physics #1: Work and Power
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Created by:
sydneygalway on February 24, 2012
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25 terms
Terms | Definitions |
|---|---|
 The word ___ means many things and can be used in many different ways. | Work |
| Work is done only when a ____ (the push) causes a change in the position or motion of an object in the direction of the applied force. | Force |
| ___ us calculated by multiplying the ____ by the ___ over which the force was applied. | Work, Force, Distance |
| Because work is calculated as ____ times _____, it is measured in units of newtons times, N*m | Force, Distance |
| These units are also called _____(J) | Joules |
| A _____ is also equivalent to : 1 kg*m2/s2 | Joule |
| The quantity that measures ___ relation to time is _____. | Work, Power |
| Power is the ____ at which ___ is done. | Rate, Work |
| Write the equation for POWER in word form: | Power equals Work divided by time |
| Write the equation for WORK in word form: | Work equals Force divided by distance |
| The SI unit of power is the ____ (W) | Watts |
| A ____ is the amount of power required to do 1 joule of work in 1 second. | Watt |
| ___ help us do work by redistributing the work that we out into them. | Machines |
| ____ can change the direction of an input force | Machines |
| This is called ____ | Multiplying the force |
| ___ is called when scientist and engineers use a number that describes how much the force or distance is multiplied by a machine. | Mechanical Advantages |
| ___ is a quality that measures how much a machine multiplies force or distance | Mechanical Advantages |
| Mechanical advantages = ___output force___= ___Input distance___ ? ? | Input force Output distance |
| ___ is the rate at which work is done, that is, how much work is done in a given amount of time | Power |
| What is the formula for POWER? | P= W/ t |
| Watts= ?/s | Watts= Joule/ s |
| What is the unit for force? | Newton |
| What equals a Joule?? | Newton meter |
| What also equals a Joule??? | kg*m2/s2 |
| what is the formula for FORCE? | F=W/d |
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