# How To Determine Newton Meter Force

1. Nov 16, 2006

### Mr. Nice Guy

Hello!

How do you calculate or determine newton meter force requirement and rpm's for an electrical motor in the following example:

A device that utilizes a shaft that is 2 inches in diameter and 6 feet length. It needs to be able to lift 10 pounds and distance of 7 feet in 6 seconds. I need to know the formulas to make these calculations and the requirements needed for this application?

Thanks in advance for any assistance!

Mr. Nice Guy.

Last edited: Nov 16, 2006
2. Nov 16, 2006

### theCandyman

RPM can be found by dividing the distance the mass must travel by the circumference of the shaft. The torque will be equal to the radius of the shaft times the force to lift the weight. I am unsure what you are asking for in the second part of your request.