a. what is the work Wg done by gravity on the system? b. What is the increase in

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a. what is the work Wg done by gravity on the system? b. What is the increase in kinetic energy (delta k) ofthe cart plus block system? c. what is the speed v of the car plus weight system d. What is the work done on the car (not the block) by thestring? e. what is the tension T in the string? An automobile of mass m=900kg is being towed by a truck whosedriver observes that the tension in the rope is T=3900N while therig (truck plus car) is uniformly accelerating such that itsvelocity increases from vi=4m/s to vf=1/8 vi over the time intervalt=5s. The wheels turn without slippin on the road and there is somefriction within the car. a. How far does the car travel in its time interval? b. what is the work done on the car by the rope? c. What is the work done to overcome friction in thecar?

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