Lab#9 Centripetal force with a motor

Purpose:
    To come up with a relationship between the angle θ and the angle speed ω.

• Get the angle theta from looking at the below triangle with hypotenuse L and height H-h
• Get h by putting a horizontal piece of paper until the stopper just grazes the top of it as it passed by.
• Get enough data to test the model by collecting values of h at a variety of ω. Functionally, do this by increasing the voltage to the motor driving the system.

Set up:

  

Conclusion:
    .    1.5759-1.5234 = 0.0525 error is acceptable for us to confirm the relationship( w = a/r) . If we increasing the radius r, then the angle speed ω will decrease, and if we increasing the angle θ，then  the angle speed ω will increasing also.