Momentum

It's the start of the second semester! yay.
Today we started unit 7. Momentum is the focus of unit 7.
Momentum has lots of different ways to describe or define it. Momentum is the quantity of motion of a moving body, measures as a product of it's mass and velocity. Momentum is the force gained by a moving object. Momentum is moving inertia. Momentum is mass times velocity. Mass times velocity seems to be the easiest way to understand momentum.
Momentum is a vector quantity. It is always conserved because of the Law of conservation of (p)momentum, which states that momentum cannot be created or destroyed, only changes forms. In an isolated system, momentum will be conserved.
Impulse is the average force upon the object multiplied by the time the force is acting on the object. In other words impulse is the change in momentum of an object. If momentum is changed, it is only because of an outside force.

We did a balloon toss today too! In order to keep the balloon from popping, you had to slow down the balloon by making the catch longer rather than stopping the balloon instantly. If you catch it fast, the impact of the balloon on your hands will be too much and the balloon will want to pop. 

This is a picture of my friend and I at Costco. I was sitting in the wagon thing. She would push me and let me go down an empty isle. This is sort of an example of momentum because as she pushed me I would gain momentum in the beginning because she would push me at a certain velocity. Then I would slow down because of impulse or the change in momentum of an object. This is only because the wheels of the cart create friction with the floor, which is an outside force causing me to slow down and lose momentum. I'm losing momentum because my velocity is becoming less and less since my speed is decreasing. Another reason I stopped is because I would hit something, which is also an outside force. That would be a sudden-stop while the slowing down would be a gradual-stop.