Energy Changes and Power

• Calculate relevant values of stored energy and energy transfers, and convert between newton meters and joules.
• For common situations, describe every change in how energy is stored as a system changes, such as a vehicle slowing down, an object being accelerated by a constant force, a moving object hitting an obstacle, and an object projected upwards or up a slope.
• Using examples, explain what is meant by power: the rate at which a system transfers energy (or does work).
• Recall and apply the relationship for power:

$P = \frac{E}{t}$