The car C and its contents have a weight of 600 lb, whereas block B has a

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The car C and its contents have a weight of 600 lb, whereas block B has a weight of 200 lb. If the car is released from rest, determine its speed when it travels 30 ft down the 20 incline. To measure the gravitational potential energy, establish separate datums at the initial elevations of B and C.

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