Hurry i'm being timed in the following situations, which ball has the greatest kinetic energy? a. a golf ball rolling off the end of a ramp b. a golf ball sitting at the top of a ramp c. a ping-pong ball rolling off the end of a ramp d. a ping-pong ball sitting at the top of a ramp

Choice a is correct.kinetic energy equation:     ke = (1/2)(m)(v²)this tells us that ke is directly proportional to mass and the square of velocity. in other words, the more mass and more velocity an object has, the more kinetic energy.if an object is sitting at the top of a ramp, there is no velocity and therefore no kinetic energy.     choices b and d are wrong.a golf ball has more mass than a ping-pong ball, so a ping-pong ball would have less kinetic energy than a golf ball rolling off the end of a ramp.     choice c is wrong.choice a is correct.