Theoretically, artificial gravity can be produced in space using circ V station consists of a large circular environment that rotates at constant speed, this will cause a centripetal acceleration. If this acceleration has a magnitude close to g = 9.8 m/s2, this will mimic the gravitational environment that we are used to on Earth. For example, objects can sit, and people can walk on the circular floor. a. What is the direction of the acceleration vector at any point on the circle? [1 mark] b. How fast would it need to spin to achieve a,=9.8 if the radius is 40 m. [1 mark]