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hmm...well i havent done this in psysics yet....but i'd say there are more than one answers for this but you seem a lot older than me but i hope this helps.....the motor size generally needs you to provide a higher voltage...and uses more energy..but again there are many answers depending on torque voltage input power...hope this has helped you a bit....anyways toodle oo ~smash
Its basically a scaling problem, how does motor size relate to energy use and frequency? Does it scale linearly or cubicly, and how?
Scaling up increases mass, hence increases rotational momentum. So if you double the size, you double the force, but you also increase the resisting momentum.There is also electrical inductance. For a motor to rotate you create a big magnetic field. To reverse you must not only destroy that field, but create another with the opposite polarity. Increasing motor size increases this field.
all these have to be taken into account: number of windings(and the gauge of that wire) , the weight of shaft, friction The actual mass of the motor may not have an effect on it, since the majority of the weight can either be the casing, the winding, or the shaft.