Forces

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Across
  1. 3. A push or a pull (always appears in pairs)
  2. 4. Causes all objects to remain or fall on the ground
  3. 7. Along the length of an object
  4. 9. Two objects attracted or repulsive of each other
Down
  1. 1. Two objects sliding past each other
  2. 2. An upward force by fluid onto an object
  3. 5. The stretching or compressing of a spring
  4. 6. A pushing or pulling from another object or person
  5. 8. The force that a surface exerts to prevent objects from falling through each other