Homework Help: AP Physics b

Posted by gaston on Thursday, November 3, 2011 at 9:33pm.

Design a carnival ride on which standing passengers are pressed against the inside curved wall of a rotating vertical cylinder. It is to turn at most at 1/7 revolution per second. Assuming a minimum coefficient of friction of 0.10 between clothing and wall, what diameter should the ride have if we can safely make the floor drop away when it reaches running speed?

PHD PHYS - winner, Thursday, January 24, 2013 at 5:43pm
r = vt / (2*pi)

r = (1/7)v/(2*pi)

r =~ 0.0227364v

μ = v^2 /rg
0.1 = v^2 /9.8*r
0.98 = v^2 / 0.0227364v
v's cancel and left with
0.98 = v / 0.0227364
then solve for V

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