physics

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Across
  1. 5. the speed of an object at a particular instant is known as its _________ speed
  2. 6. the force that opposes or tends to oppose motion between surfaces in contact
  3. 7. the object will accelerate in the direction of the _______ force
  4. 8. _____ forces is the force which exist between objects that are in contact
  5. 9. a symbol of G and a factor of 10^9
  6. 10. rate of change of displacement
  7. 11. formula = length/time
  8. 13. a region in which a mass experiences a force due to gravitational attraction
  9. 15. a tool that can measure to a precision of 0.01cm
  10. 16. SI unit of force
  11. 18. physical quantities that have both magnitude and direction
  12. 19. SI unit of length
Down
  1. 1. rate of change of velocity
  2. 2. measured with a spring balance
  3. 3. we say the forces acting on the object are _______
  4. 4. A physical quantity consists of a unit and a ______
  5. 9. count the ______ on the graph to find out the acceleration of an object
  6. 12. amount of matter in the body
  7. 14. refers to the reluctance of the object to change its state of rest or motion, due to its mass
  8. 17. SI unit of mass