Principle of Work and Energy

1. The work done on an object as it moves between two positions equals the change in its kinetic energy.
2. Princple of work and energy permits us to determine the change in the magnitude of the object's velocity.
3. This principle relates to a change in the position of an object to the change in its velocity.
4. However, it is not convenient for obtaining the time it takes the object to move from one position to another.