On this case, our lab is try to find the conservation of energy applies to this system. this lab tool try to make a environment that almost like the frictionless.
As a frictionless environment, if we apply force to the cart, the force will be keep because there is no friction, then the acceleration is 0.
The first we know the cart's mass is 0.354kg, then we will measure the distance between two strong magnets, the angle and the force.
allow our dates, the angle has 0.5 degree error and the distance has 0.05cm error.
the we get a list:
1. r=0.031, F=0.242, theta=4
2. r=0.017, F=0.602, theta=10
3. r=0.012, F=0.898, theta=15
4. r=0.010, F=1.187, theta=20.
Then we used the logger pro to measure the date which used the function F=Ar^b. the we got the A=0.002357+/-0.0007603, and B=-1.349+/-0.07236.
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