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A rock with mass .12 kilogram is fastened to a mass less string with length .80 meters to form a pendulum. The pendulum is swinging therefore as to make a maximum angle of 45o with the vertical. Air resistance is negligible.
a. Find the speed of the rock when the srongpasses through the vertical position?
b. Find the tension in the string when it makes an angle of 45 degree with vertical?
c. Find the tension in the string as it passes through the vertical?
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