Tuesday
March 31, 2015

Homework Help: Physics

Posted by Jackie on Thursday, December 1, 2011 at 4:39pm.

A popular carnival ride consists of seats attached to a central disk through cables. The passengers travel in uniform circular motion. As shown in the figure, the radius of the central disk is R0 = 3.00 m, and the length of the cable is L = 1.43 m. The mass of one of the passengers (including the chair he is sitting on) is 56.1 kg.

a) If the angle θ that the cable makes with respect to the vertical is 30, what is the speed, v, of this passenger?

b) What is the magnitude of the force exerted by the cable on the chair?

I got b), F=635.5 N, but I can't figure out a. I tried setting 635.5=mv^2/r, but that didn't work. I also tried mg=mv^2/r, v=sqrt(gr) but that also didn't work. Any help or direction would be greatly appreciated!

Here's the figure: i41.tinypic . com/2ho9v69.png

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