Module 10 Energy and Its Conservation

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Across
  1. 4. a device that makes work easier (but does not change the amount of work) by changing the magnitude or the direction of the force exerted to do work
  2. 6. a type of collision in which the kinetic energy after the collision is less than the kinetic energy before the collision
  3. 8. the SI unit of work and energy (J); 1 J of work is done when a force of 1 N acts on an object over a displacement of 1 m
  4. 11. stored energy due to the interactions between objects in a system
  5. 13. a type of collision in which the kinetic energy before and after the collision remains the same
  6. 14. the force a user exerts on a machine
  7. 15. the rate at which energy is transformed
  8. 16. for an ideal machine, is equal to the displacement of the effort force divided by the displacement of the resistance force
  9. 18. a machine consisting of two or more simple machines that are connected so that the resistance force of one machine becomes the effort force of the second machine
  10. 19. states that if there are no net external torquesnon a closed system, then its angular momentum is conserved
  11. 20. unit of power; 1 J of energy transferred in 1 s
  12. 21. the force exerted by a machine
  13. 22. the sum of kinetic energy and potential energy of the objects in a system
  14. 23. the transfer of energy that occurs when a force is applied through a distance; equal to the product of the system's displacement and the force applied to the system in the direction of displacement
  15. 24. the ability of system to produce a change in itself or in the world around it; represented by the symbol E
Down
  1. 1. the position where gravitational potential energy is defined as zero
  2. 2. the sum of the kinetic energy and the potential energy of the particles in a system
  3. 3. the energy of an system that is associated with its motion
  4. 5. the stored energy in a system resulting from the gravitational force between objects; represented by the symbol GPE
  5. 7. the energy of a system due to the system's change in position
  6. 9. the ratio of resistance force to effort force
  7. 10. kinetic energy of a system due to its rotational motion, proportional to the system's moment of inertia and the square of its angular velocity
  8. 12. stored energy due to an object's change in shape
  9. 17. states that when work is done on a system, a change in energy occurs