I've been attempting to calculate how much torque a motor needs to produce in order to start a stationary object on wheels moving. (The torque is being applied to the rear 2 wheels, the front 2 are on bearings.)
I keep seeing Torque = Force * Radius (of the torqued wheel). I can't figure out how to calculate the Force in this equation though, so that I may find the Torque.
The radius of the wheel is 3cm.
The weight of the entire object (including wheels and everything else) is 5kg.
I don't need an incredibly accurate result, so I haven't even been trying to factor in friction from the non-powered front wheels' bearings.
I tried something with a friction coefficient and gravity, but the more I read the less I believe that my calculation was correct.
Can anyone point me in the right direction?