Harvard Psychological Studies, Volume 1 / Containing Sixteen Experimental Investigations from the Harvard Psychological Laboratory.

by Unknown

Fig. 6.

In Fig. 6 rod and disc are moving in opposite directions, and

w = BB',

t =	p - w	,
	r

t =	w	,
	r'

r'(p - w) = rw ,

w(r' + r) = pr' ,

w =	pr' (5)
	r' + r .

So that to include both cases (of movement in the same or in opposite directions), we have that