topic 8 - forces doing work
Cards (14)
- Kinetic energy is energy stored in a moving object.
- Thermal energy is energy stored based on the temperature of an object.
- Chemical energy is energy stored in a fuel (chemical).
- Gravitational potential energy is energy stored when an object is working against the gravitational force, such as raising in height.
- Elastic potential energy is energy stored between bonds of objects, when an object is stretched or compressed.
- Electrostatic energy is energy stored between objects because of their charge.
- Magnetic energy is energy stored between objects because of their magnetic poles.
- Nuclear energy is energy stored between sub-atomic particles of the nucleus of an atom.
- type of energy
- light - a form of energy transfer , through the emission of an electromagnetic wave
- sound - a form of energy transfer , through the oscillation of particles
- types of energy transfer
- mechanical - a force acting on an object ( work done )
- electrical - a charged doing work ( carrying a current )
- by heating - energy transferred from a hot object to a cold object
- by radiation - energy transferred through electromagnetic waves
- work done : energy transferred to an object when a force moves the object through a distance
- W = F , S
- W - work done ( J )
- F - force (N)
- S - change in displacement (m)
- gravitational potential energy
- when an object is moved to a higher height , it gains GPE
- GPE is dependent on : mass of object , height it gains , gravitational field strength
- GPE = m x g x h
- GPE - gravitational potential energy ( J )
- m - mass ( kg )
- g - gravitational field strength ( n/kg )
- h - change in height ( m )
- kinetic energy
- energy of motion / moving object
- KE = 1/2 m v^2
- KE - kinetic energy ( J )
- m - mass ( Kg )
- v - velocity (m/s
- power : the rate of energy transfer
- power is the energy transferred per unit of time
- P = E / T
- P - power ( W - Watts )
- E - work done - energy ( J )
- T - time ( s )