When you turn on an electric motor it takes longer to come up to final speed if a grinding wheel is attached to the shaft why?

When an electric motor is turned on with a grinding wheel attached to the shaft, it takes longer to reach its final speed due to the increased inertia from the added mass of the wheel. The motor must overcome this inertia, which requires more torque and time to accelerate to the desired speed. Additionally, the grinding wheel may create resistance due to friction and load, further slowing down the acceleration process.