Angular Velocity

 

 

Conclusion

In each case, how do your measured and predicted values for the final angular velocity of the system compare?

- For our first pulley measurements our values were within 0.2, and the measurements for our second pulley were almost identical with just a .03 difference, resulting in our measured and predicted values being very similar to each other. With pulley 3 our measured and predicted values differed highly with a 2.0 difference in our values. 

Of the three places you attached the string, which produced the highest final angular velocity?  Did your measurements agree with your initial prediction?  Why or why not?  What are the limitations on the accuracy of your measurements?

- Of the three pulleys, the third pulley or the largest pulley produced the highest final angular velocity. Our measurements did not agree with our initial prediction, this can be due to the limitation of human error. As the size of the pulley increased so did the speed, because of this it became more and more difficult to accurately stop the timer after 1 revolution. 

Given your results, how much does it matter where the starter cord is attached?  Why do you think the manufacturer chose to wrap the cord around the ring?  Explain your answers.

- Applying force through a smaller radius reduces torque, which may explain why the manufacturer chose to wrap the cord around the ring, because it ultimately makes it easier to control the starter when pulling on the cord.