Physics crossword puzzle

1234567
Across
  1. 5. speed is decreasing
  2. 6. forces acting on an object are equal
  3. 7. a unit of force
Down
  1. 1. forces acting on an object are not equal
  2. 2. speed is increasing
  3. 3. speed with direction
  4. 4. sum of all the forces acting on an object