Pure Physics (Chapter 1, 2, 3 and 4)

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Across
  1. 1. The force due to gravity is the __________ and only attractive.
  2. 5. What is the contact force that opposes or tends to oppose motion between surfaces in contact called?
  3. 9. What is the SI unit for length?
  4. 10. Weight is usually measured by?
  5. 13. An object undergoes _______________ when its speed and/or direction change(s)
  6. 17. An object falling through air achieves __________ velocity when its weight is equal to the air resistance against it.
  7. 18. The bigger the force, the ______ compressed the spring.
  8. 19. What error do we have to avoid when using the vernier calipers and micrometer screw gauge?
  9. 20. What error do we have to avoid when using the metre rule?
Down
  1. 2. When the resultant force is zero, we say that the forces are in _______________
  2. 3. Which is denser? Oxygen or helium?
  3. 4. Mass is ________ regardless of the gravitational field strength.
  4. 6. The _____ under the velocity-time graph gives the displacement of the object
  5. 7. Simple block diagrams with arrows to represent forces acting on individual objects are called _________ diagrams.
  6. 8. If the resultant force acting on an object is not zero, we say the forces acting on the object are __________
  7. 10. Does ice float or sink on turpentine?
  8. 11. Weight is the amount of _______________ force acting on a body.
  9. 12. What is the rate of change of displacement?
  10. 14. What is the SI unit of forces?
  11. 15. A physical quantity consists of a numerical magnitude and a _____
  12. 16. What is the physical quantities that have both magnitude and direction?
  13. 20. What is one complete oscillation called?