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You throw a rock with an initial horizontal velocity and it hits the ground at x meters away from your feet. What if: (a) You throw the same stone with the same initial conditions but instead you do this on a another planet with a mass 4 times the mass of the earth. With what factor will x change? (b) You throw the same stone with the same initial conditions but instead you do this on a another planet with a radius 6 times the radius of the earth. With what factor will x change?

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