Physics Questions: Circular Motion
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Physics Questions: Circular Motion

[From: ] [author: ] [Date: 12-01-02] [Hit: ]
v = 17.2.Assuming that the rod is mass less.Unreasonable value of velocity is given.......
1. Friction provides the force needed for a car to travel around a flat, circular race track. What is the maximum speed at which a car can safety travel if the radius of the track is 80.0 meters and the coefficient of friction is .40?

2. A rotating rod that is .153 meters long is spun with its axis through one end of the rod so that the other end of the rod has a speed of 2010 m/s. (4500 mph)

a. What is the centripetal acceleration of the end of the rod?
b. If you were to attach a 1.0 g object to the end of the rod, what force would be needed to hold it on the rod?

Please work me though these problems, im completely lost.

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μg provides the centripetal acceleration

v² /R = μg

v² = μg R = 0.4*9.8*80

v = 17.7 m/s
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2.
Assuming that the rod is mass less.

a = v² /R =

Substitute the value of v and r and find a
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The force is calculated using F = ma
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Unreasonable value of velocity is given.


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