Physics, 23.06.2019 23:00, reaperdraws

An instrument is thrown upward with a speed of 15 m/s on the surface of planet x where the acceleration due to gravity is 2.5 m/s2 and there is no atmosphere. how long does it take for the instrument to return to where it was thrown?

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An instrument is thrown upward with a speed of 15 m/s on the surface of planet x where the accelerat...