We went over more on collision today. When we were looking at the crashed car we noticed that it was an inelastic collision because if it was an elastic one, the two objects would become one but instead they bounced off of each other (in a way). You could see the airbag that had blown up in the car which forced air into a bag and it comes straight at you with a great amount of force in a little time!
We also learned more about impulses and collisions when bouncing water balloons up and down with our towels. I decided to do this at home too! So i filled my water balloon and bounced it up with my little brother. By using the towels we accelerate it up and when it falls down, the towel then absorbs some of the force reducing the force and having it spread out over a longer period of time. Since force and time have an inverse relationship, as one goes up, the other goes down. If we have a long period of time that force is spread out in, the force would be smaller, which doesn't cause the water balloon to break. But if we dropped it on the ground, the stop to the ground applies a lot of force for a very short period of time (less than a second!) Gladly we didn't pop the balloon. :) We plugged in numbers into equations again to find missing variables such as the original velocity, final velocity of an object, or its momentum. We used the equations MaVao+MbVbo=(Ma+Mb)V or MaVao+MbVbo=MaVa+MbVb. We also applied time to find force by using the equation Ft=mv!
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