B 1. What is the difference between potential and kinetic energy? A Kinetic Position, Potential. Motion C. Potential & Kinetic = Position Potential Position; Kinetic: Motion D. Kinetic & Potential - Motion 2 How much potential energy will a 75kg person have 100m above the ground? А 9800 C. 7500 B. 73500 D. 735) 3. Which object will have the most kinetic energy? А. Small object moving slowly C. Small object moving quickly B. Large object moving quickly D. Large object moving slowly 4. Calculate the kinetic energy of a 125 kg barbell moving at 4.5 m/s. A. 562.5 C. 1265.631 B. B. 2531.251 D. 281.251 5. Mechanical energy is A. PE * KE C. PE - KE B. PE/KE D. PE+KE 6. Which of the following is not an example of potential energy? A. A running woman C. A tightly stretched rubber band B. An incredibly compressed spring D. An apple dangling off a branch 7. A man stands on a tall ladder of height h. He leans over a little too far and falls off the ladder. If his mass is m, what is his potential energy right before he falls? A. 2mgh C. mgh B. mgh D. √2gh 8 A ball drops from a height h. What more do we need to calculate initial potential energy? A mass C. displacement B. velocity D. time 9. Which of the following is a unit of energy? A. Newton (N) C. Meter (m) B. Joule (J) D. Liter (L) 10. Which is the best example that something has kinetic energy? A. a car parked on a steep hill C. a picture hanging on the wall B. a tennis ball rolling across the court D. a piece of coal before it's burned 11. Sound waves are a special kind of wave that can be detected by A. The human eye B. Computer C. The human ear D. Electronic instrument 12. A sound wave cannot travel through which of the following? A Vacuum B. Air C. Water D. Metal 13. Because a sound wave must travel through a medium, It is called a wave A. Mechanical B. Electrical C. Light D. Electromagnetic 14. What is the source of a sound wave? B. Vibration A. Electricity D. Conduction C. Light waves 15. Why is sound able to travel faster through a solid than a gas? A. Gas molecules are packed tightly. C. Gas molecules move slowly. B Solid molecules are packed tightly. D. Sound does not travel faster through a solid than a gas. 16. Why is sound able to travel faster through warm materials than cold materials? A. Gas molecules are packed tightly. C. Warm molecules move slowly. B. Warm molecules are moving quickly. D. Sound does not travel faster through a warm substance. matter. 17. Sound waves move more quickly through A. Warm B. Cold 18. Which factor does not affect the speed of sound? B. Distance A. Temperature C. Elasticity D. Density 19. Which item will sound travel faster through? B. Foam C. Steam D. Wooden block​