Saturday, November 26, 2011
Blog Post #13
Hey guys. It's me again with another blog post. Sorry but I'm going to be talking about egg drops again. So this week we finally did our egg drops. My partner and I made a type of box with tons of little foam cushions in it. We made sure that the box was secure but has enough room for the impulse to push through. There are a lot of physics involved in stopping an egg from breaking. My partner and I realized that an average egg has a certain mass. We used this to calculate the momentum of the drop. We also realized that whatever we build has to not only cushion the egg from the bottom, but protect it from the impulse pushing down on the egg. Therefore, we made a box full and placed the egg in the center. This makes the egg experience the cushioning from below it and protect from the impulse pushing from above at all sides. We also had to make sure that the egg doesn't shift around in the box. So we made sure the the egg was secured in a protected foam wrapping and placed styrofoam packing-peanuts in the box. This is because when the egg shifts around, it has inner liquids inside it, therefore if the liquids shift around a lot, the shell could crack from the inside. We also had another problem that we never expected. There was a ton of air pushing against the box. This made the box shift slightly to the right. However, this actually helped. You see, when the air pushes on it, it increased the time of impact on the egg. This will also help cushion the egg in a sense that the box will hit the ground slower. But whatever the cause, the egg survived. I believe the only modifications I would make on the contraption is maybe making adding a parachute, if possible. If not, I would have just left it. And that was our egg drop. Sorry it was so long today. But I hope you guys could try an egg drop. And be creative on how to make it.
Sunday, November 20, 2011
Hey guys I'm back with another installment of my blog. This time I want to talk to you about egg dropping. So, did you ever talk to your friends and go, how do I make an egg drop from a certain height without making it break. So i have prepared a picture that I drew on my awesome Wacom tablet, of a person dropping an egg of a ledge. You can easily find the velocity of a single egg by using various equasions. We are going to say that this ledge is about 10 meters. But to save space I solved for it already and got about 14 m/s. Using this, we can solve for momentum and find out how much we need to slow it down, in order for it not to crack. Anyways, I really haven't fully mastered it so I cannot say for sure that I know what I am doing, anyways, hope you enjoyed it. I basically showed you the steps on how to not crack it, but it's really up to you to be creative in finding new and different ways. So have fun and always be creative.
Monday, November 14, 2011
Blogpost #11
Sorry if this doesn't work I will upload it when I get a chance to use my computer again. Anyways tonight I will be talking to you about momentum yet again. Today's focus is on conservation of momentum. This is basically saying that in a select system or operation an object will not change when acted upon a different object. Confusing? Yeah I know. Let me explain through example. These balls are flying directly at each other. When they hit they will basically trade velocities or speeds. Meaning that if the first ball had a velocity of 4m/s and the second had a velocity at 5 m/s, when they hit, the first ball will bounce back at around 5 m/s and the second one will go at 4 m/s. So the next time you and your friend are throwing balls and your friend decides to throw a ball at you, don't be an idiot and throw the ball directly at that ball expecting it to bounce off and not hit you in the head. Anyways I'm hoping to get off of this chapter soon because it's making my brain hurt but for now I hope you enjoyed this demonstration of the conservation of momentum.
Sunday, November 6, 2011
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