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7.) Please help with question and provide full body diagram with explanation

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A rock with mass 10 kg is fastened to a massless string with length 8 m
to form a pendulum. The pendulum swings with a maximum angle of
60 deg with the vertical. A) What is the speed of the rock when the
string passes through the vertical (bottom) position? B) How fast is the
rock moving at an angle of 30 deg?

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