THIS ONE IS ABOUT MAAAATHS

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Across
  1. 1. Measured in kilograms (4)
  2. 4. Measured in Newtons, depends on gravity (6)
  3. 5. A nice word, seen as e or µ, between 0 and 1 (11)
  4. 6. A change in momentum (7)
  5. 7. Mass x Velocity (8)
  6. 8. A turning force (6)
  7. 9. This is pretending to be computing, 0101010111 (6)
Down
  1. 2. No friction, also me (6)
  2. 3. Resistive force found on surfaces (8)
  3. 5. I know we just met and this is crazy, but here's my number (4,2,5)
  4. 9. Always on the slopes, always, rolly rolly (4)