Physical Science Unit 2 Vocab

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Across
  1. 1. the force of gravity acting on an object
  2. 2. the ability of a fluid to exert an upward force on an object placed in it
  3. 8. a friction force that opposes the motion of an object through a fluid
  4. 10. the amount of matter in an object
  5. 12. a friction force that opposes the motion of an object as it slides over a surface
  6. 13. an upward force due to a pressure difference between the top and bottom of a wing
  7. 16. a substance or mixture that flows and has no shape of its own
  8. 18. a force associated with charged particles, which has two aspects, electric force and magnetic force
  9. 20. the overall force acting on an object after all the forces are combined
  10. 23. an attractive force that acts between any two objects
  11. 25. the tendency of an object to resist a change in its motion
  12. 26. a force that continuously changes the direction of an object to make it move in a circle
  13. 27. the SI unit of pressure, qual to 1 newton per square meter (N/m2)
  14. 28. the constant velocity of a falling object when the force of air resistance equals the force of gravity
  15. 29. fluid friction acting on an object moving through the air
Down
  1. 1. a powerful attractive force that acts over a short range
  2. 3. the powerful attractive force that binds protons and neutrons together in the nucleus
  3. 4. the attraction between any two objects because of their masses
  4. 5. the product of an object's mass and its velocity
  5. 6. a force that opposes the motion of objects that touch as they move past each other
  6. 7. a friction force that acts on objects that are not moving
  7. 9. the equivalence of the buoyant forces on an object ad the wright of the fluid displaced by the object
  8. 11. states that the total momentum of a system does not change if no net force acts on the system; neither created or destroyed during a collision, only transferred
  9. 14. a friction force that acts on rolling objects, caused by the change in shape at the point of rolling contact
  10. 15. a push or a pull that acts on an object
  11. 17. the SI unit for force, equal to the force that causes a 1kg mass to accelerate at a rate of 1 m/s squared
  12. 19. the result of a force distributed over an area
  13. 21. a device that uses a pressurized fluid acting on pistons of different sizes to increase force
  14. 22. the curved path of an object in free fall after it is given an initial forward velocity
  15. 24. an upward force acting on an object in a fluid