Energy and work unit physics pg.121
- Created by: ifechi68
- Created on: 09-12-19 08:31
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- Energy and work
- force(F) and displacement (s)
- Force and displacement are vectors this means they have direction as well as size
- Work done = force x distance moved in the same direction w=f^s
- w=F^s
- pressure(P) and volume(V)
- A liquid or gas exerts pressure in all directions
- when it changes volume by flowing or expanding it does work by pushing against its surroundings
- work done = pressure x volume change
- W = p^V
- pressure is measured in pascal(Pa)
- volume is in cubic meters (m3)
- 1m3=1000 litres, 10^6cm3, 10^9mm3
- A liquid or gas exerts pressure in all directions
- power
- power is the rate of using energy or doing work
- the unite for energy is joule (J) the unite for power is watt (W) = J/s
- kilowatt(kW)= 1000watts megawatt(MW)=10^6watts gigawatt(GW)=10^9watts
- the unite for energy is joule (J) the unite for power is watt (W) = J/s
- power is the rate of using energy or doing work
- other forms of energy
- chemical energy( chemical bonding) nuclear energy(nuclear reactions) electrical energy thermal energy
- force(F) and displacement (s)
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