Background Essay

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In many DEEP projects, there are numerous laws that could apply to their experiment. Laws such as, Dalton's law, Boyle's law, or Henry's law. In contrast to the other projects, our experiment had no definite law to compare it to. In our experiment, we were finding out the amount of time for various objects to fall sixteen feet in both air and water. The amount of time directly relates to the among of drag the object has. The amount of drag can be measured in this equation

Drag=coefficient x density x (velocity squared)*.5 surface areas

Although the formula is complex, it can be broken down:

the drag coefficient- The drag coefficient is the ratio of the drag on an object moving through air to the product of the velocity and the surface area of the object.

density- Density is the quantity of something per unit measure, especially per unit length, area, or volume. This is important to finding the drag because the more dense something is, the faster it falls.

velocity- The velocity is the speed of an object with a direction. In our case the direction is down. to find out the drag, you have to square it, then divide the it by two.

surface area ­ This is the amount of area on the object that touches the air or water. the amount of surface area contributes to the amount of drag because the more surface area an object has, the fore friction it will have with the air or water.

This explains why the CD takes the longest to fall to the ground. It is because it has a great surface area, a low density, and therefore, a low velocity. Drag is the reason behind this because all those things add up to a great amount of drag. However, the spike had the smaller amount of drag. This was because it had a small surface area, a high density, a low drag.

Though there were numerous contributors to our results, the factor of drag was the most prominent.