A block of mass m=2kg is being pulled by a force F on a rough surface of coefficient of friction =0.5 Vo=10m/s is the speed at x =0 and v=6m/s is the speed at x = 4m a) Find the work done by friction between x=O and x = 4m b) Find the work done by the force F between x = 0 and x = 4m c) If the applied force F is a variable force of

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