Gears & Pulleys Crossword

5. In a worm gear system the direction of transmission is not _____________
6. A gear system has a mechanical advantage of 0.1. What is the velocity ratio of the system?
9. Pulley Output Diameter/Pulley Input Diameter
10. A pair of gears stacked that rotate on the same axis.
12. Type of cylindrical gear with teeth parallel to the axis of rotation
14. A large output gear rotates more ________ compared to a small input gear
15. Output Speed/Input Speed (8.5)
17. Bevel gears change the direction of drive in a gear system by ________ degrees
18. Output speed of pulley system in Fig. 3 if input speed = 90 rpm
19. A type of pulley belt which cannot slip off the pulley wheels (typically narrower and useful in small spaces)
20. Two gears, A and B, are connected together. If A rotates in a clockwise direction, what direction does B rotate in?
21. The only type of pulley belt which can maintain a constant velocity ratio.
22. Velocity ratio of gear system in Fig. 1
23. Output speed of gear system in Fig. 1 if input speed = 10 rpm
24. Pulley systems are _________ than chain driven sprocket gear systems.
26. Another word for “input” gear

1. A gear system that turns rotational motion into linear motion (e.g. in a car steering mechanism) (4,3,6)
2. Mechanical advantage of pulley system in Fig. 3
3. Pulley Input Diameter/Pulley Output Diameter
4. Another word for “output” gear
7. Output Teeth/Input Teeth (10,9)
8. A gear used to ensure that the output gear rotates in the same direction as the input gear.
10. A gear system where two directly connected gears rotate in the same direction (5,6,8)
11. The type of gear system used in a hand whisk.
13. The rotational velocity of gears is measured in ________ ___ __________ (11,3,6)
16. Gear D’s velocity in Fig. 2 (Gear A’s speed is 120 rpm)
19. Input Teeth/Output Teeth (8,5)
23. A gear system has an overall velocity ratio of 4. If the input velocity is 10 rpm, what is the output velocity?
25. The type of gear system used in a guitar tuning mechanism