SS A trolley child of total mass 200 kg is moving with a uniform speed...

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SS A trolley child of total mass 200 kg is moving with a uniform speed of 36 km h on a frictionless track The child of mass 20 kg starts running on the trolley from one end to the other 10 m away with a speed of 10 ms relative to the trolley in the direction of the trolley s motion and jumps out of the trolley with the same relative velocity What is the final speed of the trolley How much has the trolley moved from the time the child begins to run and just before jump

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