Barry is conducting an experiment and rolls a tennis ball down a ramp. Which best describes the motion of the tennis ball?

Kinetic energy = 1/2mv^2. since the mass is constant we can form a ratio of it's kinetic energy at 60 divided by that at 30 to see ke(60)/ke(30) = +(60^2)/30^2). this may be said to 300% increase.

During the 1800s. hope this !