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

- Physics -
**drwls**, Thursday, December 1, 2011 at 5:11pm
I cannot find the web site of your figure, but thanks for showing you work.

Let the cable force be T.

T cos30 = M g

T = 634.8 N

T sin30 = M V^2/R = T/2

R is the orbit radius, which is probably

R = Ro + Lsin30 = 3.72 m

(Without the figure, that is an educated guess)

Solve for V

- Physics -
**Jackie**, Thursday, December 1, 2011 at 5:23pm
Thank you so much, you guessed right without the figure. I really appreciate the help!

## Answer this Question

## Related Questions

- Physics - The figure shows three rotating, uniform disks that are coupled by ...
- Physics please help????? - The figure shows three rotating, uniform disks that ...
- physics - a physical pendulum consists of a uniform solid disk (of radius R = 42...
- Physics - A flat uniform circular disk (radius = 2.10 m, mass = 1.00 102 kg) is ...
- physics - A uniform circular disk of mass 24.0 g and radius 40.0 cm hangs ...
- physics - a disk of mass M and radius R is attached to a spring of constant k ....
- Physics - Someone please help me! I've been stuck on this problem for a while ...
- Physics - A solid cylindrical disk has a radius of 0.18 m. It is mounted to an ...
- physics - A solid cylindrical disk has a radius of 0.17 m. It is mounted to an ...
- physics - You've taken your neighbor's young child to the carnival to ride the ...

More Related Questions