Sunday, November 27, 2011

Egg Drop

This week my blog post will be about my egg drop project. My partner was Rachelle and in preparation for the egg drop project I spent a whole day after school at her house. We walked around in Target for two hours after brainstorming some ideas. We decided to use bubble wrap as our bag or container because that absorbs a lot of shock. Then on the inside we decided to use Timothy hay because we noticed that if you packed it in tightly, the egg on the inside wouldn't move. We also noticed that by stuffing the bubble wrap with something, it'd made the shape of the bubble wrap rounder which would've helped to absorb more of the shock. Unfortunately after all our hard work, the egg cracked anyway. It most likely cracked because it bounced, which was what we were trying to avoid entirely. I realized we could've done much more simpler things or even used cotton balls to stuff the bubble wrap instead of hay.

Sunday, November 20, 2011

Collisions

I learned that there are two types of collisions when it comes to momentum. One is elastic collision and the other is inelastic collision. An elastic collision is one that is bouncy; the initial kinetic energy is conserved, meaning that the momentum transferred in from one object is equal to the transferred momentum out the other object. An inelastic collision is one that is sticky; the initial kinetic energy is not conserved, meaning that the momentum transferred in from one object is not transferred out the other. In inelastic collisions, the objects usually come to a stop and in elastic collisions the object that the initial momentum acted upon receives whatever the initial momentum transferred to it. A good example of this would be car collisions. Sometimes in car crashes the cars are squished together (inelastic) and sometimes one car is propelled from the other cars momentum (elastic).
 

Monday, November 7, 2011

Momentum


My definition of momentum is the amount of something it takes to make something move. I think it relates to acceleration, mass, magnitude and most definitely inertia. When I think of the word momentum I think of an object having to swing back and forth to a certain height in order to clear the distance of something. The Webster’s Dictionary definition is: the quantity of motion of a moving body, measured by a product of its mass and velocity. I was kind of close to the Webster’s Dictionary definition. Momentum has to do with the muchness of the moving of an object.