The acceleration due to gravity at the surface of a planet depends on the planet's mass and size; therefore other planets will have accelerations due to gravity d 9.8 m/s?. Imagine an astronaut stands on an alien planet, which has no atmosphere, and throws a rock with a speed of 7.35 m/s in the horizontal direction, rele height of 1.40 m above the surface of the planet. The rock hits the surtace a horizontal distance of 9.10 m from the astronaut. Find the magnitude of the accelerated gravity, ______in m/s on this alien planet