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Quick Answer: 
  1. $930\textrm{ m}$
  2. $5400\textrm{ N}$
  3. $3800\textrm{ N}$

Giancoli 7th Edition, Chapter 5, Problem 12



For part c, how can you be certain to use 233.33 m/s as your velocity if this is the velocity give by the problem for the lowest point of the loop? I solved the problem by using 6.0g as my radial acceleration (i got the correct answer but I'm not sure why). Thank You.

Oops I misread the part where it said "same speed".