Vocabulary Unit 4; Forces

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Across
  1. 2. The contact force exerted by a surface on an object resting on it, acting perpendicular to the surface.
  2. 5. The Law of __ Gravitation states that every particle attracts every other particle with a force proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
  3. 8. A measure of the amount of matter in an object, and of its inertia.
  4. 10. The vector sum of all forces acting on an object. A nonzero net force will cause an object to accelerate.
  5. 14. The tendency of an object to resist a change in its state of motion.
  6. 16. Newton's __ Law: Whenever one object exerts a force on a second object (action force), the second object simultaneously exerts a force equal in magnitude and opposite in direction (reaction force) on the first object
  7. 17. __force requires no touching to push or pull a mass.
  8. 18. Newton's ___ Law: The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F=ma)
Down
  1. 1. __ force arise from physical interaction or touching between objects.
  2. 3. The force exerted by a spring that is stretched or compressed, pulling or pushing back toward its original shape.
  3. 4. Newton's __ Law; An object in motion stays in motion with the same speed and in the same direction, and an object at rest stays at rest, unless acted upon by an unbalanced force.
  4. 6. A diagram used to show all the forces acting on a single object.
  5. 7. The pulling force transmitted axially by a string, rope, or cable when it is pulled tight by forces acting from opposite ends.
  6. 9. Force exerted on an object by a person or a machine.
  7. 11. A push or a pull that acts on an object; it can cause an object to accelerate or deform.
  8. 12. A force that opposes relative motion or the tendency of motion between surfaces in contact.
  9. 13. The force of gravity acting on an object, calculated as mass × acceleration due to gravity (W=mg).
  10. 15. The SI unit of force, defined as the force required to accelerate 1 kilogram of mass at a rate of 1 meter per second squared (m/s²)