Work & Energy
- Created by: Jo Wells
- Created on: 28-12-12 13:38
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- Work & Energy
- "When a force moves an object through a distance, ENERGY IS TRANSFERRED and WORK IS DONE"
- Work Done (J) = Force X Distance
- W = F X d
- Work Done (J) = Force X Distance
- Gravitational Potential Energy
- = Energy due to Height
- Gravitational Potential Energy = mass X gravitational field strength X height
- GPE = m X g X h
- Kinetic Energy
- Depends on mass & speed
- More it weighs & the faster it's going = bigger kinetic energy
- Kinetic Energy transferred = work done
- A moving car = lots of kinetic energy & to slow it down, the energy needs to be converted to other types of energy
- Kinetic energy needs to be converted to heat energy (as FRICTION between wheels & brake pads) = temperature of brakes rises
- Kinetic Energy Transferred = Work Done by Brakes
- 1/2 X m X v squared = F X d
- Kinetic Energy Transferred = Work Done by Brakes
- Kinetic energy needs to be converted to heat energy (as FRICTION between wheels & brake pads) = temperature of brakes rises
- A moving car = lots of kinetic energy & to slow it down, the energy needs to be converted to other types of energy
- Falling Objects convert POTENTIAL energy into KINETIC energy
- Gravitational Potential Energy
- = Energy due to Height
- Gravitational Potential Energy = mass X gravitational field strength X height
- GPE = m X g X h
- Kinetic energy GAINED = Potential energy LOST
- Some is also transferred to HEAT & SOUND
- Gravitational Potential Energy
- Depends on mass & speed
- "When a force moves an object through a distance, ENERGY IS TRANSFERRED and WORK IS DONE"
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