A2 Physics crossword

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Across
  1. 5. In a gravitational ________, the arrows are pointing in the direction of the force and field strength.
  2. 6. With an object tied to a string, the ____________ provides at least some of the centripetal force to move the object in a circle.
  3. 9. The gravitational ________ ___________ is the gravitational force on a small test mass per unit mass. (2 words, no spaces)
  4. 11. At any one time, an object in circular motion has a motion that is at a ______ to the circle.
  5. 13. This is the change of momentum given to an object. It can be found as the area of the F vs t graph.
  6. 14. A small gas molecule of mass m and velocity v makes an elastic collision against a wall. What is the change of momentum of the molecule?
  7. 15. An ____________ collision is one in which kinetic energy is conserved
Down
  1. 1. __________ came up with three laws about orbits, and we learned the third one.
  2. 2. The _________ of a satellite moving in an orbit around the Earth does not determine its orbital period.
  3. 3. Centripetal acceleration is directed towards the ________ of the circle.
  4. 4. Newton’s 2nd Law is better stated as “force is directly proportional to rate of change of __________ “.
  5. 7. Gravitational force is always _____________ and never repulsive.
  6. 8. The ________ speed of an object is defined as the rate of change of angle.
  7. 10. An ____________ collision is one in which kinetic energy is not conserved
  8. 12. Centripetal force is not _________ . It must be provided by some other force.