Recent content by lemaitre

Hi haruspex. Thank you for pointing that out. I have corrected it. Did I do Question 3 correctly? Also, I'd appreciate it if you give me more hint for Question 5. Does it have anything to do with conservation of energy? By the way, I should have mentioned, this is not a homework question...

Thank you cepheid. So for Alice to remain in contact with the cylinder wall, N \gt 0. N = mg\cos\theta + m\omega^{2}R, so N \gt 0 \Rightarrow mg\cos\theta + m\omega^{2}R \gt 0 \Rightarrow \omega \gt \sqrt{\frac{-g\cos\theta}{R}}. Hence the minimum \omega is \sqrt{\frac{-g\cos\theta}{R}}...

A fairground ride takes the form of a hollow, cylinder of radius R rotating about its axis. People lie down cylinder wall when it is stationary. The rotation is then started, and once the cylinder has reached its operating angular velocity \omega, its axis, and the people, are gradually rotated...