# Calculating Power Worksheet Answer Key

Calculating Power Worksheets help you look at the world of cost in a new light. You can start with a blank sheet of paper and use the worksheet to help you look at everything from room size to the number of people in your home. Each answer is calculated based on the answers to the previous questions.

The name Calculating Power Worksheet comes from the worksheet’s formula for answering the question, “What does power do?” You can find it in the Worksheet.xls file on Microsoft Excel. This worksheet’s formula is as follows:

We need to take a look at what power does first. Power is simply the force or the rate at which something moves. It doesn’t matter how it moves, whether that move is the kind that we can feel, or it is something that we don’t have a lot of control over, like the acceleration of a vehicle. For instance, a car moving at 100 miles per hour has the same force that would be generated by a person stepping back from their computer and moving their hand ten inches in a clockwise direction.

The power is the same whether you are using it in a mechanical sense or an electrical sense. To use a different example, take a look at what happens when electricity is used to turn a dial. That is a mechanical movement and the movement is regulated by magnets, and that is what we are used to seeing as the effects of electricity on a machine or object.

It doesn’t matter how the energy is used either, whether it is hot air blown into a room from a blower, or electricity sent from a wall socket. The same result will be achieved, whether it is done from a hardwired connection, or by getting the machine to communicate with some other device.

How much power is needed will determine the answer to the next question. A typical household uses between two hundred and two thousand watts of electricity per day. If we take an average home, that would be approximately one hundred kilowatts. It takes about two watts of power to do the kind of work that our computers are doing right now.