Chapter 3, Problem 1P

To determine

Define total energy. Write the various forms of energy that constitute the total energy.

Explanation of Solution

Total energy:

Total energy is referred to as the sum of all kinds of energy that a system constitutes. It is denoted by $E$ and its unit is $\text{kJ}$.

The total energy of the system per unit mass is denoted by $e$ and its unit is $\text{kJ}/\text{kg}$. It is expressed as follows:

  $e=\frac{E}{m}$

Here, total energy is $E$ and unit mass is $m$.

The various forms of energy that constitute the total energy are as follows:

• Internal energy
• Kinetic energy
• Potential energy

Write the expression for the total energy of a system as follows:

  $E=U+KE+PE$

Here, the internal energy is U, kinetic energy is $KE$, and the potential energy is $PE$.