#15 Collisions in two dimensions

Collisions in two dimensions

Introduction:

We learn how two do the momentum stuff in one dimension, then now we are trying to collision balls in two dimensions.  In this lab, we set up ours experiment on the leveled glass table, and roll our balls but not hit straight to the other ball. Also, we do it twice that one is metal ball the metal ball, another is marvel to metal ball.

Experiment:

We set up the video capture right above the glass table.

1)
using two metal balls with same mass which is 67.2g
and this is what we get

and this is our calculate 

In x and y axis 

we see that the momentum before and after are almost same 

then we find the relationship in KE 

find the error is 2%

2)using two ball 

the rolling ball is 19.6g    another is 67.3g

this is what we get

this is our calculation 

In x and y axis 

we see that the momentum before and after are almost same 

then we find the relationship in KE 

the error is 9%


conclusion:

after two experiment can tell that how the energy and the momentum relate before and after two balls do collision
we calculate both and just get a smell error which is lower than 10%
It is close to what we expect.