HEY RYAN THIS IS THE PAGE FOR YOU TO GRADE, IT WAS HERE ALL ALONG THANKS!
We built everything seen in the photos of the final product without any modification except the gear system. We started out with a small gear as the input and a large gear as the output but we wanted to increase the speed of the book being raised, so we switched the gears. The final product ended up having the large gear as the input and the small gear as the output.
Conclusion Questions:
- For which mechanism was it the easiest to determine the mechanical advantage or drive ratio? Why was it the easiest? The easiest was the pulley because all I had to do was count the strands off the pulley.
- For which mechanism was it the most difficult to determine the mechanical advantage or drive ratio? Why was it the most difficult? The most difficult to determine was the gear ratio of the sprockets because I had to count each tooth before I could do any math.
- What are your estimates the input and output force values of your compound machine? How did you arrive at your estimated values? If the book weighed about 442 grams and our apparatus to hold the book weighed another quarter of a pound we are talking a rough estimate of 1.25 to 1.5 pounds as the resistance force. Just guessing using my precision bicep I guess that the force needed to pull the chain would be about a pound.
- What modifications could you make to your compound machine to make it more mechanically efficient? In the case of our gear system we could add a lubricant to the chain to reduce friction and increase efficiency.