A wrecking ball is suspended from a crane by a cable that is 30 m long. How much time is required for such a simple pendulum to make one complete oscillation? no picture was given to me Ok this is a pendulum problem and its asking for time which is the period. So I think that this formula should work since its a simple harmonic motion prob. and asking for Time. T= 2pi[L/g]^1/2 T=2pi[30/9.81m/s]^1/2 T=9.61s Is this correct or did I miss something.