# Relationship between power and energy physics projects

### Energy & Power Science Projects

Energy can be converted between different forms. Let's start with a different example though, to understand the relation between power and. You probably don't spend a lot of time thinking about where all that power comes from, but someone has to! Figuring out the best ways to produce energy is a. Teacher's Guides. The Physics Classroom» Physics Tutorial» Work, Energy, and Power Lesson 2 - The Work-Energy Relationship. Internal vs. External.

A garage hoist steadily lifts a car up 2 meters in 15 seconds. Calculate the power delivered to the car. Use kg for the mass of the car. First we need the work done, which requires the force necessary to lift the car against gravity: It has the same units as work, the Joule J. There are many forms of energy: Work has been done on a spring to compress or stretch it; the spring has the ability to push or pull on another object and do work on it. The force required to stretch a spring is proportional to the distance it is stretched: Find the energy stored in a tonne of water at the top of a 20 m high hydroelectric dam.

The short way is to combine the formulas, replacing F with mg and using h height in place of d: A mass is moving and can do work when it hits another object.

Electrons can flow out of a battery or capacitor and do work on another electrical component such as a light bulb. In this formula, E stands for energy, H stands for height above the ground and W stands for weight of the jar. If your jar is measured in pounds and the height above the ground is measured as a fraction of a foot, the units of your energy will be in foot-pounds. Unlike varying the degree of the incline, varying the weight by using a lighter or heavier jar will produce very different outcomes.

Varying the weight of the jar by filling it with water produces unpredictable outcomes because energy is lost by the sloshing of the water in the jar. Large jar and lid. The jar should have a wide mouth and smooth sides. Large peanut butter or mayonnaise jars work well.

• Work and Energy

Small jar and lid. Like the large jar, this should also have a wide mouth and smooth sides. The important consideration is that the small jar weighs appreciably less than the large jar.

## Work, Power, and Energy

A large sturdy board, at least 1 foot wide and 4 feet long. The depth of the board does not matter. The board needs to be smooth, so as to cause as little friction as possible. Stack of books or blocks of various sizes for propping up the board Water Camera Masking tape Using your stack of books or blocks, place several under the board to create an incline.

### Work and Energy | Science project | index-art.info

The stack of books should be sufficient to raise the top of board exactly 3 inches off the ground directly underneath the books. Draw a line across the board exactly where the height is 3 inches off the ground. Stick a piece of masking tape so it runs the up and down one side of the jar from top to bottom. When you roll the bottle down the incline, be sure to align your tape with the line you drew in step one.

Roll the large jar down the incline 10 times, being sure to align your tape with the line on the board that marks 3-inch height. For each roll, measure the distance that the jar rolled using the bottom of the incline as a starting point, and the center of the bottom of the resting jar as an end point.

Average these distances together. Increase the incline so that the board forms a steeper angle.

### Work, Energy, and Power

Once again, identify the part of the board in which the top of the board is three inches from the ground and draw a parallel line across the board at this place.

Roll the bottle ten times, starting the roll from the line you just drew. Repeat ten times and average together. Does changing the incline matter?