To increase fan speed, what adjustment should be made?

To increase the fan speed, increasing the diameter of the pulley on the motor shaft is the appropriate adjustment because the pulley system operates under the principles of mechanical advantage. When the diameter of the pulley on the motor is increased, it causes the fan to spin faster since the motor will turn the larger pulley, creating a more significant rotational force that is applied to the fan through a series of belts or direct connection.

By understanding the relationship between pulley sizes and rotation speed, one can see that larger pulleys lead to an increase in the rotational speed transferred to the fan. Factors such as friction, motor power, and efficiency can also play roles in the overall performance but adjusting the size of the pulleys directly impacts the speed of the fan in a mechanical system. Therefore, this adjustment is the most effective way to achieve the desired increase in fan speed.