Gears transmit what between machines while changing rotation, speed, and torque?

Gears are mechanical components specifically designed to transmit power between machines. They do this by engaging with each other through their teeth, which determines how they interact and influence movement. The primary function of gears is to enable a change in rotation, speed, and torque to suit the machinery's requirements.

When gears mesh together, they transfer power from one gear to another. This power transmission is essential in a variety of machines, as it allows for the efficient conversion of energy from one form of mechanical motion to another, facilitating operations across various applications. By adjusting the sizes of the gears used, engineers can manipulate speed and torque, making them fundamental components in machinery design.

While movement, load, and the physical teeth of the gears are important aspects of their operation, they are secondary to the overall concept of power transmission. The correct answer highlights the integral role gears play in moving power through mechanical systems, making them essential for effective machine function.