Mechanical engineers design the links and joints that form this robot's manipulator arm in order to preceisely move and place cargo in a warehouse.

After completer chapitre 7, you should answer these questions:

1. List several of the units that engineers use for angular velocity.

2. In what types of calculations must the unit of rad/s be used for angular
   velocity?

3. What is the difference between average and instantaneous power?

4. Sketch the shape of a spur gear’s teeth.

5. What is the fundamental property of gearsets?

6. Define the terms “diametral pitch” and “module.”

7. What is a rack and pinion?

8. How do helical gears differ from spur gears?

9. Make a sketch to show the difference in shaft orientations when bevel
   gears and crossed helical gears are used.

10. How do simple and compound geartrains differ?

11. How are the velocity and torque ratios of a geartrain defined?

12. What relationship exists between the velocity and torque ratios for an
    ideal geartrain?

13. What are some of the differences between a V-belt and a timing belt?

14. Sketch a planetary geartrain, label its main components, and explain
    how it operates.

15. Describe the main components of an automobile’s drivetrain.

16. What function does the differential in an automobile serve?