A race car accelerates uniformly from rest to 46.1 m/s in 2.47 seconds. Determine the acceleration of the car. Please? these are all the points I have. I really need an answer for this. If you are gonna give me a wrong answer, then its just better to not try answering this please

Suppose that three astronomical objects, 1, 2, and 3 are observed to lie on a line, and the distance from object 1 to object 3 is d. object 1 has four times the mass of object 3, and seven times the mass of object 2. find the distance between objects 1 and 2 for which the net force on object 2 is zero.