Physics - Chapter 5

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Across
  1. 3. mechanical advantage of a machine is the ratio of the distance Xa moved by the applied force to the distance Xl.
  2. 4. a machine equals the ratio between its actual and its ideal mechanical advantages.
  3. 5. equilibrium in which an object is not rotating, or if it is rotating at constant angular speed about an axis.
  4. 7. a machine involves the forces or distance concerned in a machine.
  5. 11. it refers to an object extended in space which does not change its size or shape when subjected to a force.
  6. 12. mechanical advantage of a machine is a ratio between the load force.
  7. 14. the point of an object about which all gravitational torques cancel.
  8. 16. is stimulated by an electrical pulse from the nervous system, it contracts briefly or twitches.
  9. 17. its a simplest form of a rigid bar used with a fulcrum.
  10. 19. if an object rests on a knife edge or similar surface so that a slight displacement (or rotation) raises the CG, this subject is displaying _______ equilibrium.
  11. 20. is the study of forces acting on an object that is in equilibrium and at rest.
Down
  1. 1. equilibrium is the CG is lowered by a small distancement or rotation the object is then in ______ equilibrium.
  2. 2. the point at which all the mass of an object or system may be considered to be concentrated.
  3. 6. is a device that changes the magnitude, direction or mode of application of a force or torque while transmitting it in order to achieve a practical advantages.
  4. 8. are forces whose lines of actions intersect on a common point when they act on an object.
  5. 9. are forces having their lives of action lie on a same plane.
  6. 10. a condition in which two or more forces acting on an object reduces no acceleration because they balance each other out.
  7. 13. it is measured by the product of the force and the perpendicular distance from the axis of rotation to the line of action of the force.
  8. 15. a force that tend to produce rotation in the axis.
  9. 18. equilibrium if the object may move without changing the height of its CG, the object is in _______ equilibrium.