Ooooh I want a HIPPOPOTAMUS for chrimas

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Across
  1. 6. This is how fast my hippo would accelerate if i pushed him down a hill
  2. 7. This is the speed that the hippo (I'm getting for Christmas) is going down a hill
  3. 9. A hippopotamus has more _____ than me
  4. 12. This is the force if I pushed my hippo
  5. 14. The harder the Hippo bit down on the watermelon the faster it would smashed
  6. 15. If I pushed my hippo down an infinite hill without _____ it would go on forever
  7. 16. If i went down a hill i would go faster
  8. 17. I would be floating in space with my hippo without _______
Down
  1. 1. If I wanted to draw my hippo in motion he would be a box and I would use a ____ ____ _______
  2. 2. It doesn't take hippos as much _______ to break a watermelon as I do
  3. 3. If I slapped my fat pet Hippo (that I'm getting for Christmas) the force of my hand would be equal and opposite the force of the hippo back on me
  4. 4. A hippo fell on his head and he discovered the 3 laws
  5. 5. My hippo laid on me the force of him on me and me on him are _____ ___ _______
  6. 8. This is how much gravity pulls down the fat hippo
  7. 10. 2 hippos stacked on top of each other are about 3 _____
  8. 11. If I Hippotaped a hippo to a skate board it would stay there until I pushed it
  9. 13. When my hippo is going forward it is in _______