Generate a mathematical equation that compares the speed of two objects.
The mathematical equation to compare the speed of two objects is v1 = x/t1 and v2 = x/t2, where v1 and v2 are the velocities of the first and second objects, respectively, x is the distance travelled, and t1 and t2 are the time elapsed. By comparing the two equations, the ratio of the two velocities can be determined.
Object A's speed = Object B's speed / 2