Hand-held concrete troweling machines must be fitted with a control switch that automatically shuts off power when the hands of the user are separated from the handles.
One of the more important of this machine should be closed automatically because the source of energy is limited and doing this wastage of energy can be reduced.Another thing that this is also used from safety purposes.
Joel has a steeper slope on the graph. The steeper a slope is, the faster speed will be. Therefore, Joel's slope is steeper which increases overall speed.
