Explain the term energy.
Energy is defined as the capacity of a body to do work.
(a) What do you understand by the term "transformation of energy" ? Explain with an example.
(b) Explain the transformation of energy in the following cases :
(i) A ball thrown upwards.
(ii) A stone dropped from the roof of a building.
Explain the term ‘Gravitational Potential Energy’.
Explain the term ‘Elastic Potential Energy’.
Explain heat in terms of energy.
Explain the terms renewable and non-renewable sources of energy. Explain why fossil fuels are called non-renewable sources of energy?