Forms of energy- Chemical, kinetic, gravitational potential, elastic,elcetrical, sound, light, thermal.....
Energy can chamge from one form to another- energy cannot be created or destroyed.
Useful energy- Energy transferred to where it is wanted in the form it is wanted, eg- rollercoaster- kinetic energy
Wasted energy- Energy that is not useful- eg- rollercoaster- sound and thermal (from friction)
Efficiency= useful energy transferred by a device / total energy transferred by a device- Wasted energy causes inefficiency!
Comments
No comments have yet been made