Consider the pendulum shown. Initially, a mass M = 3.00 kg attached to a string is at rest (zero velocity) with the string horizontal as shown in the top diagram.

The mass is released and swings down as shown in the bottom diagram. However, the string will break when the tension is 70.1 N.

At what angle from the vertical, ?, as shown in the diagram, will the string break?

Note: It turns out that the answer does not depend on the length of the string. You might want to think about the "Pirate Ship" problem done in class this week.

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