Question: A bar of mass m is pulled by means of a thread up an inclined plane forming an angle α with the horizontal (Fig). The

A bar of mass m is pulled by means of a thread up an inclined plane forming an angle α with the horizontal (Fig). The coefficient of friction is equal to k. Find the angle β which the thread must form with the inclined plane for the tension of the thread to be minimum. What is it equal top

Fig. 1.13.

Fig. 1.13.

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