Question

using gears for mechanical advantage allows us to multiply or reduce that amount of ____ force without having to adjust the ____ force or change the direction of rotation. speed, torque directional, speed mechanical, electrical output, input

Explanation:

Gears are used in mechanical systems. The concept of mechanical advantage in gears relates to output and input forces. When using gears for mechanical advantage, the goal is to manipulate the output force. And it's done without adjusting the input force (as gears' main function here is about the relationship between output and input in terms of force - multiplying or reducing output force while input force remains as is in terms of not being adjusted in the context of this mechanical advantage use regarding force). Also, the second blank is about the force that is not adjusted. In gear systems for mechanical advantage (in the context of force manipulation), the input force is what you put in, and output is what you get out (in terms of force after mechanical advantage effect). So the words "output" and "input" fit the blanks as per the gear - mechanical advantage - force relationship.

Answer:

Output, input