A ball of mass 0.700 kg is carefully balanced on a shelf that is 2.90 m above the ground. What is its gravitational potential energy? 28.4 J. 6.86 J 2.03 J 19.9 J A tiny mouse runs by and bumps the ball, causing it to fall off the shelf. What will the ball's kinetic energy be just before it hits the ground? 39.8.J 19.93 9.95 J OJ How fast will the ball be moving just before it strikes the ground? 39.8 m/s 6.31 m/s 56.8 m/s 7.54 m/s Explain your reasoning: This ungraded area will provide insight to your instructor.