A student of weight 655 N rides a steadily rotating Ferris wheel (the student si

Question

A student of weight 655 N rides a steadily rotating Ferris wheel (the student sits upright). At the highest point, the magnitude of the normal force FN on the student from the seat is 551 N.

(a) Does the student feel "light" or "heavy" there?
heavy
light

(b)What is the magnitude of FN at the lowest point?

(c) If the wheel's speed is doubled, what is the magnitude of FN at the highest point?

(d) What is the magnitude of FN at the lowest point under the same conditions as in (c)?


I tried drawing a FBD for this but I don't understand how the Normal force doesn't equal to the weight of the person, regardless of the position

Explanation / Answer

!!!...READ THROUGH THIS AS I HAVE CHANGED THE VALUES...!!!
(makes you think and work it out yourself)

A) Lighter. although the forces are still present the earths gravity becomes less and less...? (not sure - get more info about this!)

at highest point
mg-N = ma
670-569 = (670/9.81)a ,a=v^2/r
a= 1.48

B) N-mg =ma
N-670 = (670/9.81)(1.48)
N=771N

C) when the speed is doubled
a=1.48*4
a=5.92

mg-N = ma
670-N =(670/9.81)5.92
N=265.7N

D) N-mg= ma
N-670 = (670/9.81)(5.92)
N=1074.3N

hope this may help - maybe get more info on part A.

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