A pendulum is made out of a (251.3 +/- 0.1) g mass and a string that is (1.3 +/- 0.005) m long. If the mass has a speed of (1.3 +/- 0.1) m/s at the bottom of the swing:
A) Calculate the centripetal acceleration of the mass (with uncertainty).
B) Calculate the tension in the string (with uncertainty).
C) Determine the centripetal force acting on the mass (with uncertainty).