What is railroad cars final speed

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Q. A 30,000 kg railroad car initially traveling to the right at 15 m/s collides inelastically with a 20,000 kg railroad car initially traveling to the left at 5 m/s. The cars stick together. What is their final speed?

Q. A flight attendant pulls her 61 N flight bag a distance of 279 m along a level airport floor at a constant velocity. The force she exerts is 41 N at an angle of 50° above the horizontal.

Reference no: EM1346486

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