To add to what Paul said.
The standard speed for an electric motor is 1650 rpm. A tractor pto at idle maybe around 150 rpm or lower.
So a tractor pto is already considerable lower rpm to start with.
If the pulley on the electric motor is 2 inches and the driven pulley is 12 inches that will give the rpm of about 250 or so.
Measure the 2 pulley diameters and get back to us.