A cannon is on the surface of a planet that has a mass of 1.00 x 10²⁰ kg and a radius of 1.00 x 10⁹ m. The cannon fires a ball radially outwards (vertically up). What is the speed required for the cannonball to escape the gravitational influence of the planet? If you need the universal gravitational constant, use G = 6.67 x 10^-11 m³kg^-1s^-2.

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