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I’m working on this problem for my physics class, and I just can’t seem to get the answer right. Here is the problem.

"There is a carnival ride called the Zipper which contains a long bar, rotating at its center around which, cars move and rotate. Assume the radius of the long bar to be 3 meters and have it rotate a 6 rpm. Assume the car moves around the end of the bar in a radius of 1 meter with a velocity of 3 meters per second. Determine the total force exerted on a 80kg person in the car when the bar is at the (a) top of its swing and (b) at the bottom of the swing.

The answers are (a) 301.72N and (b) 1260.28N

Ok, so I started out by converting the rotational velocity of the large bar to translational velocity. From there my only thought was to add that velocity to the velocity of the car as it swings around the end of the bar. I then thought that by subtracting the force of gravity at the top, and adding it at the bottom, the problem would be solved. Wrong! Anyways, I have been using the radial force equation (m*v^2)/r. Any hints to what I’m doing wrong would be very much appreciated! Thanks in advance,

Dan

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# Carnival Ride

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