5. What is the article "Crashing, Jumping, Falling" mostly about? A. the physical processes involved in crashing, jumping and falling B. the dangers of driving fast, going skydiving and wrecking buildings C. how tensional energy affects everything we do D. why bigger baseball bats are more effective for hitting homeruns 6. What is an example of "potential energy"? A. the energy that moves a rollercoaster car as it rolls downhill on the tracks B. the energy that is exerted on a brick wall after a car hits it C. the energy stored in a wrecking ball after lifting it in the air above the ground D. the energy that is used to move a baseball over the fence of a baseball field 7. Choose the answer that best completes the sentence below. __ the skydiver jumps from the plane at 20 ,000 feet, the potential energy stored inside him is converted to kinetic energy. A. However B. When C. Although D. Before