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A 4.6-kg metal ball of radius 30 cm is attached by a string of length 50...

A 4.6-kg metal ball of radius 30 cm is attached by a string of length 50 cm at its center to a vertical wall. The coefficient of friction between the wall and the ball is 0.20. Determine the tension on the string.

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Answer #1

The situation can be visualized by

The free-body diagram for the ball is

From the first diagram

That gives us

Now, at equilibrium

And

That gives us

Putting in the first equation

So, the tension in the string is 49 N.

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