A motorcycle rides on the vertical walls around the perimeter of a large circular room. The friction coefficient between the mot

orcycle tires and the walls is µ. How does the minimum µ needed to prevent the motorcycle from slipping downwards change with the motorcycle’s speed, s?
a) µ ∝ s0b) µ ∝ s−1/2c) µ ∝ s−1d) µ ∝ s−2e) none of these

Physics

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