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Q1. A toy train rolls around a horizontal 1.5--diameter track. The coefficient of rolling friction is 0.12.

What is the magnitude of train's angular acceleration after it is released?

How long does it take the train to stop if it's released with the angular speed of 33rpm?

Q2. A banked circular highway curve is designed for traffic moving at 85 km/h. The radius of the curve is 158 m. Traffic is moving along highway at 48 km/h on the rainy day. What is the minimum coefficient of friction between tires and road that would allow cars to negotiate turn without sliding off the road?

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  • Category:- Physics
  • Reference No.:- M9162040

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