Unit 7

Today in class we started a new unit, this unit was Unit 7! We're studying momentum and how it is effected by mass. We also got to do a lab where we got to see how objects with greater mass affected and how they were affected when colliding with other objects of the same, lesser or greater mass. This lab although very long was kind of interesting. When my table group had a heavy cart colide with a lighter cart they both went towards each other then after colliding instead of the heavier one plowing through the lighter they both went back to their starting positions. I thought that this was interesting because I figured based on my experiences that the one with the greater would keep going in the same path. Due to no friction though it went back to its starting point which was the opposite direction of where it was headed. Because this unit is all about momentum I think I should tell you what momentum is.
Momentum is a vector quantity meaning it has velocity and a direction.
The unit for Momentum isn't a pretty one it simply is kg m/s

Law of Momentum (p)
Momentum is always conserved within a system if the total force applied from outside the system was zero.
Momentum (p) = mass (m) x velocity (v)
p=mv

Pfinal - Pinitial = average force x change in time

Average force = change in p / change in time

Change in p = force x change in time = Impulse (i or j)

Impulse = i
i = change in p
i = force x change in time