physics crossword

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Across
  1. 2. / quantity of matter
  2. 4. / an object initially propelled by a force outside itself and keeps moving
  3. 5. / any physical quantity that is defined by size and direction
  4. 6. fall / an object is free-falling when only gravity is the force pulling it down
  5. 7. / an attractive force between two objects in the universe
  6. 9. energy / the energy an object has by virtue of its position in a force field like gravity (stored energy)
  7. 10. / the tendency of objects to resist changes in speed or direction of motion
Down
  1. 1. / refers to size of a vector
  2. 3. / measure of how fast velocity is changing; time rate of change
  3. 8. / the speed and direction of motion