Chapter 2 - Gears

Chapter 2 was mainly about gears, what they are used for, and how they work. The main reason for using gears, is to apply a torque to velocity ratio. This allows an engine or rotating axle produce either more pushinf power or a higher rate of speed. In a race car for example, where the vehicle is light, the large gear is the driving gear, and the small gear is the driven gear. This would mean that the driven gear would turn a lot more times for each rotation of the big gear. In a bulldozer, a device which requires lots of pushing power, the small gear is the driving gear,the driven gear is the large gear. This would mean that the driven gear would only turn once for more than one turn of the driving gear, increasing overall torque, but reducing speed.