Crossword Puzzle: Simple Machines

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Across
  1. 4. claw hammer/crow bar
  2. 6. multiple simple machines working together
  3. 8. engery from motion
  4. 9. bicycle/steering wheel
  5. 10. usually used with a screwdriver
Down
  1. 1. chain reaction with multiple simple machines
  2. 2. basic mechanical device
  3. 3. knife/axe
  4. 5. ramp/staircase
  5. 7. helpful in raising heavy loads