Energy and Forces with Santa

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Across
  1. 2. The single force deciding if Santa speeds up or slows down
  2. 3. Steepness of Santa’s distance-time graph showing speed
  3. 7. How much of Santa’s effort actually delivers presents
  4. 8. Shows Santa’s journey using distance and time
  5. 9. How quickly elves use energy to build toys
  6. 12. Presents gain this energy store when lifted onto the sleigh
  7. 13. Unit for how powerful the toy-making machines are
  8. 14. Forward force from reindeer launching the sleigh
  9. 15. Another name for the steepness of Santa’s travel graph
  10. 16. Force slowing the sleigh as it scrapes snowy rooftops
  11. 18. Unit for the energy in Santa’s sack
  12. 20. How long Santa has to deliver all the presents
  13. 21. Santa’s sleigh has this energy store while flying between houses
  14. 23. When Rudolph pulls harder and the sleigh accelerates
Down
  1. 1. When the sleigh cruises steadily on Christmas Eve
  2. 4. How quickly the sleigh speeds up leaving the North Pole
  3. 5. Air resistance pushing back on the sleigh at high speed
  4. 6. Wasted energy heating the sleigh runners as they slide
  5. 10. Energy stored in stretched reins as reindeer pull forward
  6. 11. How far Santa travels between chimneys
  7. 13. Downward force on a sack full of presents
  8. 15. Distance covered per second on Santa’s route
  9. 17. Energy store in reindeer muscles after eating Christmas carrots
  10. 19. Energy transferred when elves lift heavy gift boxes
  11. 22. How fast and in what direction Santa travels