A toy train rolls around a horizontal 18-rm m-diameter


A toy train rolls around a horizontal 1.8-{\rm m}-diameter track. The coefficient of rolling friction is 0.14.

a) What is the magnitude of the train's angular acceleration after it is released?
b) How long does it take the train to stop if it's releasedwith an angular speed of 31 rpm?

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Physics: A toy train rolls around a horizontal 18-rm m-diameter
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