Question

2 N7M.6 A 150-lb student rides a Ferris wheel that rotates at a constant rate. At the highest point, the seat exerts a nor- mal force of magnitude 110 lb on the student. What would the magnitude of this normal force be at the lowest point? (Hint: An object with mass 1 kg weighs 2.2 lb.)

Answer 1

SOLUTION :

We have

w = constant

At highest point,

m g - N = m w^2 r

150 - 110 = m w^2 r

m w^2 r = 40 lb

At lowest point,

N - m g = m w^2r

N = m g + m w^2 r

= 150 + 40

= 190 lb