Ferris wheel has radius of 5.0 m and makes one revolution in 8.0 seconds. A person weighing 670 N is sitting on one of the benches attached at the rim of the wheel. What is the apparent weight (that is, the normal force in Newtons exerted on her by the bench) of the person as she passes through the highest point of her motion? (Don't forget about sigfigs)   I understand how to calculate the answer but cannot determine the correct number of sig figs for the final answer.

Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter7: Gravity
Section: Chapter Questions
Problem 38PQ
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A Ferris wheel has radius of 5.0 m and makes one revolution in 8.0 seconds. A person weighing 670 N is sitting on one of the benches attached at the rim of the wheel. What is the apparent weight (that is, the normal force in Newtons exerted on her by the bench) of the person as she passes through the highest point of her motion? (Don't forget about sigfigs)
 
I understand how to calculate the answer but cannot determine the correct number of sig figs for the final answer. 
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