A small rock with mass 0.12 kg is fastened to a massless string with length 0.80 m to form a pendulum. The pendulum is swinging so as to make a maximum angle of 45 ∘ with the vertical. Air resistance is negligible.

A. What is the speed of the rock when the string passes through the vertical position?

Express your answer using two significant figures.

B. What is the tension in the string when it makes an angle of

45∘ with the vertical?

Express your answer using two significant figures.

C. What is the tension in the string as it passes through the vertical?

Express your answer using two significant figures.

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