In hand-pumped railcar races, a speed of has been achieved
Chapter , Problem 31(choose chapter or problem)
In hand-pumped railcar races, a speed of has been achieved by teams of four people. A car that has a mass equal to is moving at that speed toward a river when Carlos, the chief pumper, notices that the bridge ahead is out. All four people (each with a mass of ) simultaneously jump backward off the car with a velocity that has a horizontal component of relative to the car. The car proceeds off the bank and falls into the water a horizontal distance of from the bank. (a) Estimate the time of the fall of the railcar. (b) What is the horizontal component of the velocity of the pumpers when they hit the ground?
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