Motor force

1. Aug 5, 2010

Molochlp

Hey guys,

I have a DC motor and i want to glue to it's rotor a round plate (make a hole through it and stick the rotor in that hole :) )(consider the plate weightless) and on this plate i will glue a weight, doesn't matter what the weight is...just know that it's constant.

My question is this: how does the surface of the plate (on which the wight stands on) be so that the motor can, more easily, turn the weight. If i use a smaller plate (2cm diameter) instead of a bigger one (7cm diameter) will this make it easier for the motor or harder? How does the surface of the plate influence the force of the motor?

Hope i explained it right, if you don't understand something..do tell and i'll explain it again :)

(I know it might seem like an electrical engineering problem, but i don't think it is)

2. Aug 5, 2010

Mech_Engineer

You're right that it's a mechanical engineering problem, not an electrical engineering problem. If you're picky, you could consider it an electro-mechanical engineering problem.

The answers you seek should all be contained here:

http://en.wikipedia.org/wiki/Rotational_inertia