Runout of a large landslide. Consider a landslide mass that fails from an elevation of 2500 m. The valley floor onto which the rockmass tumbles lies at 1700 m. The mass comes to a screeching halt on the opposite valley wall at an elevation of 1950 m. Calculate the maximum and minimum speed at which the mass is traveling as it crosses the valley floor. Given these estimates, estimate how much time a citizen of the valley floor would have to get out of the path of the slide if they were fortunate enough to have witnessed its initiation.