The car has a mass m0 and is used to tow the smooth chain having a total length l and a ma...

The car has a mass m0 and is used to tow the smooth chain having a total length l and a mass per unit of length m'. If the chain is originally piled up, determine the tractive force F that must be supplied by the rear wheels of the car, necessary to maintain a constant speed v while the chain is being drawn out.