___ affect the time required for a motor to come to a stop.

The time required for a motor to come to a stop is influenced by multiple factors, specifically the inertia of the motor and its load, as well as friction.

Inertia plays a significant role because it is the property of an object to resist changes in its state of motion. A motor with a greater inertia, which may be due to its mass or the mass of the load it is driving, will take longer to decelerate and come to a stop once the power is cut off. This is because more force (or effort) is needed to change its speed.

Friction also affects the stopping time of a motor. Frictional forces present in the motor's components and in the load it drives serve as resistive forces that work against the motion of the motor. When the motor is turned off, frictional forces will begin to decelerate the motor gradually. Depending on the amount of friction present, the stopping time can vary significantly.

Thus, both the inertia of the motor and its load and friction are critical factors that directly influence how quickly or slowly a motor coasts to a stop after power is removed. This combination of effects makes the answer that includes both aspects the most comprehensive and accurate.