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[" A number of particles "],[" start sim...

[" A number of particles "],[" start simultaneously from "],[" the same point in all "],[" directions in a vertical "],[" plane with same speed u."],[" Then after time "t=2s" from "],[" time of start,they will lie "],[" on a circle of center "],[[u=10m/s,g=10m/s^(2)]],[(0,-50)],[(50,-50)],[(0,-100)]

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