A rock far outside a solar system similar to ours is initially moving very slowly relative to its sun, in the plane of the orbit of a large planet (about the size of jupiter) around its sun. the rock falls toward the sun, but on its way to the sun it collides with the planet. the mass of the planet is 8 x 10²⁷ kg, the mass of its sun is 2.7 10³⁰kg, the radius of the planet is 1.4 x 10⁸ m.calculate the rocks speed just before it collides with the planet.