Newton's Laws Vocab

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Across
  1. 3. the force of gravity, W, acting on an object of mass m; defined mathematically as W = mg, where g is the magnitude and direction of the acceleration due to gravity
  2. 7. the net external force, Fnet, on an object is proportional to and in the same direction as the acceleration of the object, a, and also proportional to the object’s mass, m; defined mathematically as Fnet=ma
  3. 9. the constant velocity of an object that is reached when the drag force equals the force of gravity
  4. 10. the tendency of an object at rest to remain at rest, or for a moving object to remain in motion in a straight line and at a constant speed
  5. 15. when one body exerts a force on a second body, the first body experiences a force that is equal in magnitude and opposite in direction to the force that it exerts
  6. 18. a force that pushes an object forward in response to the backward ejection of mass by the object; rockets and airplanes are pushed forward by a thrust reaction force in response to ejecting gases backward
  7. 21. a vector quantity that relates the mass of an object to the gravitational force it experiences at a given location. Represented by the symbol g
  8. 22. the force exerted by a fluid on an object that opposes the object’s motion through the fluid; depends on the object’s motion and properties and the fluid’s properties
  9. 23. A pair of forces that are equal in strength but opposite in direction and act on different objects
  10. 24. a body at rest remains at rest or, if in motion, remains in motion at a constant speed in a straight line, unless acted on by a net external force; also known as the law of inertia
  11. 25. a pulling force that acts along a connecting medium, especially a stretched flexible connector, such as a rope or cable; when a rope supports the weight of an object, the force exerted on the object by the rope is called tension
Down
  1. 1. the sum of all forces acting on an object or system
  2. 2. one or more objects of interest for which only the forces acting on them from the outside are considered, but not the forces acting between them or inside them
  3. 4. a push or pull on an object with a specific magnitude and direction; can be represented by vectors; can be expressed as a multiple of a standard force; the SI unit of force is the Newton (N)
  4. 5. where an object would naturally rest in the absence of a net force
  5. 6. a diagram showing all external forces acting on a body
  6. 8. a force acting on an object or system that originates outside of the object or system
  7. 11. the support force acting on an object
  8. 12. the study of how forces affect the motion of objects and systems
  9. 13. the quantity of matter in a substance; the SI unit of mass is the kilogram
  10. 14. that component of the contact force between two objects, which acts perpendicularly to and away from their plane of contact
  11. 16. an objects apparent weight of aero that results when there are no contact forces supporting the object
  12. 17. various forces that may impede a rolling wheel; these include axle friction, drag, and imperfectly elastic deformation of the wheel and/or surface
  13. 19. a situation in which the only force acting on an object is the force of gravity
  14. 20. an external force that acts opposite to the direction of motion or, for when there is no relative motion, in the direction needed to prevent slipping