Determine at what speed was it thrown

Reference no: EM13488221

Standing on the surface of planet zork (which has mass M_z and radius R_z) you throw a rock(mass m straight up). The maximum height that it reaches is a distance of 5 times R_z from the center o the planet. At what speed was it thrown? (Express your answer in equation form)

Reference no: EM13488221

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