Explain the different forms of energy.
$(a)$ Heat Energy
$(b)$ Chemical Energy
$(c)$ Electrical Energy

(N/A) $(1)$ Heat Energy:
The frictional force is a non-conservative force. When a block of mass $m$ slides on a rough horizontal surface with speed $v_{0}$,it comes to a halt over a distance $x_{0}$. The work done by the force of kinetic friction $f$ over $x_{0}$ is $-f x_{0}$. By the work-energy theorem,$\frac{1}{2} m v_{0}^{2} = f x_{0}$. The kinetic energy is converted into internal energy,increasing the temperature of the block and the surface. For example,rubbing palms generates heat.
$(2)$ Chemical Energy:
Chemical energy arises from the different binding energies of molecules participating in a chemical reaction. $A$ stable compound has less energy than its separated components. If the total energy of reactants is greater than that of products,heat is released (exothermic reaction). If it is less,heat is absorbed (endothermic reaction). This energy is associated with the electromagnetic forces that bind atoms into molecules.
$(3)$ Electrical Energy:
Electrical energy is associated with the flow of electric current in a circuit. It is defined as the product of electric potential and electric charge. It is essential for modern daily life,powering household appliances.