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Dynamics of Rigid Bodies A block and a spool are each pulled across a level, frictionless surface by a string, as shown below. The string pulling the block is tied to the center of the front of the block. The string pulling the spool is wrapped many times around the spool and may unwind as it is pulled. The block and spool have the same mass. The strings start pulling with the same constant force at the same instant. 1)Predict whether the spool will cross the finish line before, after, or at the same time as the block. Explain. 2)Three students discuss the block-and-spool problem.