Write the equation of motion for a pendulum consisting of a thin 4kg stick of length L suspended from a pivot. How long should the rod be in order for the period to be exactly 2 sec? (The inertia I of a thin stick about an end point is 1/3mL^2. assume that theta is small enough that sin(theta) aprox=0). Why do you think grandfather clocks are typicly about 6 ft high?