To calculate torque to turn a rod, you will need to know the force applied to the rod and the length of the rod. The formula for torque is torque = force x distance. Therefore, to calculate torque, you will multiply the force applied to the rod by the length of the rod.
Torque is typically measured in newton-meters (N*m) or foot-pounds (ft*lb). These units represent the amount of force and distance used in the calculation of torque.
Friction can affect the torque required to turn a rod by creating resistance against the motion of the rod. This resistance will require more force to overcome, thus increasing the torque needed to turn the rod.
Yes, the length of the rod can impact the torque required to turn it. A longer rod will require more force to turn it, resulting in a higher torque value. Similarly, a shorter rod will require less force and have a lower torque value.
In addition to friction and length, the weight of the rod, the angle at which it is being turned, and the material of the rod can also affect the torque required. Heavier rods, larger angles, and more rigid materials may require more torque to turn.