Use ke=\frac{1}{2}mv^{2}
susan and hannah are each riding a swing. susan has a mass of 25 kilograms, and hannah has a mass of 30 kilograms. susan’s swing moves with a velocity of 10 meters/second, while hannah’s swing moves with a velocity of 8.5 meters/second. susan’s kinetic energy is (* 1,080, 1,250, 1,350, 1,500) joules. susan’s kinetic energy is greater than hannah’s because (speed has a greater effect than mass, mass has a greater effect than speed, mass and speed have the same effect, or mass and speed don’t have any effect) .