physics chapter 5

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Across
  1. 6. The SI unit of power is the watt
  2. 7. the conservation of mechanical energy occurs in the absence of friction, the total mechanical energy remains the same
  3. 8. the sum of kinetic energy and all forms of potential energy
  4. 10. the energy associated with an object because of the position, shape, or condition of the object
  5. 12. For a flexible spring, the spring constant is small, whereas for a stiff spring, the spring constant is large
  6. 16. the sign of the net work on the object tells you whether the object's speed is increasing or decreasing
  7. 17. the product of the component of a force along the direction of displacement and the magnitude of the displacement
  8. 18. gravitational potential energy = mass × free-fall acceleration × height
  9. 19. initial mechanical energy = final mechanical energy (in the absence of friction)
  10. 22. the potential energy stored in the gravitational fields of interacting bodies
  11. 24. SI unit for kinetic energy (and all other forms of energy) is the joule
  12. 25. a conserved quantity that you are already familiar with is mass
  13. 27. there are 2 types of potential energy
  14. 28. the energy available for use when a deformed elastic object returns to its original configuration
  15. 30. The object’s speed decreases if the net work is negative.
Down
  1. 1. the net work done by all the forces acting on an object is equal to the change in the object’s kinetic energy
  2. 2. Work is a _______ quantity and can be positive or negative
  3. 3. The joule is named for the_____ physicist James Prescott Joule (1818–1889).
  4. 4. kinetic energy = 1× mass × (speed)2
  5. 5. the energy of an object that is due to the object’s motion
  6. 9. Components of the force perpendicular to a displacement do not do work.
  7. 11. Machines with different power ratings do the same amount of work in different time intervals
  8. 13. All energy, such as nuclear, chemical, internal, and electrical, that is not mechanical energy is classified as nonmechanical energy.
  9. 14. The net work done on or by an object is equal to the change in the kinetic energy of the object.
  10. 15. The energy that each ball has varies in a way that keeps the total energy of the system constant.
  11. 20. a parameter that is a measure of a spring’s resistance to being compressed or stretched
  12. 21. gravitational potential energy in this chapter is valid only when the free-fall acceleration is constant over the entire height, such as at any point near the Earth’s surface.
  13. 23. Work, energy, and power are related to one another
  14. 26. a quantity that measures the rate at which work is done or energy is transformed
  15. 29. power = force x speed