Physics equations

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Across
  1. 2. new length minus original length
  2. 3. 0.5 times elastic constant times extension squared
  3. 4. mass times gravitational field strength
  4. 8. force over mass
  5. 9. mass times velocity
Down
  1. 1. mass times gravitational field strength times change in height
  2. 5. mass times velocity squared times 0.5
  3. 6. distance times force
  4. 7. energy over time