In an amusement park, a cylinder rotates with 40 pm and it creates centripetal force on a

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Question:

In an amusement park, a cylinder rotates with 40 pm and it creates centripetal force on a student body with mass of 70.0 kg which it is cause to make him stuck on the wall of cylinder without falling and touching the floor. The radius of cylinder is 3.80m. Find static friction coefficient between student's body and the wall of cylinder.