Error Propagation
The period T of a pendulum is given by T = 2π
Here l is the length of the pendulum and g is the gravitational acceleration. Compute g and ?g using the measured values l = 99.8 cm, ?l= 0.3 cm, T = 2.03 s, ?T = 0.05 s and assuming that the measurements of l and T are uncorrelated.