posted by .

hello everyone...i just has a general question. I am trying to study for physics. The chapter is contains potential energy, conservative, non conservative, kinetic energy. They have a definition of each , but i still don't have a better understanding of them. I cant defferential between them. I need examples, pictures or something to help me visulalize it in order to understand it. or even a simplified definition of each would help as well...thanks everyone...u guys are best :)

  • physics -

    If a mechanical system is conservative, the loss of potential energy goes into kinetic energy and any loss of kinetic energy shows up as potential energy.
    In other words, the sum of potential and kinetic energy is constant in a conservative mechanical system.
    If energy leaves the mechanical system, for example is conducted and radiated away as heat energy, then the sum of kinetic and potential energy in the mechanical system decreases.
    An example of a conservative physics problem is a rock falling off the cliff until it hits the ground. If air resistance is ignored (note you have to say that to keep the problem conservative) any m g h lost becomes (1/2) m v^2 and the sum of potential (mgh) and kinetic (1/2)m v^2 energy is constant all the way down. at any height h we can calculate v from that relationship.
    When the rock hits the ground, the whole analysis falls apart. The potential energy is gone and the kinetic enrgy is gone., both probably as heat in the earth and a slight warming of the rock.

  • physics -


Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. college physics

    Explain each of the following questions. ( a) Can an object– Earth system have kinetic energy and not gravitational potential energy?
  2. Physics

    A single conservative force F(x) acts on a 1.6 kg particle that moves along an x axis. The potential energy U(x) associated with F(x) is given by U(x) = -2.9xe-x/3 where x is in meters. At x = 3.4 m the particle has a kinetic energy …
  3. Physics

    Calculate the work done by non conservative forces of a hockey stick hitting a tennis ball using elastic potential energy, and kinetic energy if the mass of the ball is 0.058kg and the ball is shot at 34m/s for .41s and travels 5.09m, …
  4. Physics

    Describe 4 everyday situations where mechanical energy is approximately conserved because work done by the non-conservative forces is ignorable. Please mention which non-conservative force is doing negligible work in each case you …
  5. Physics

    A ball is falling through the air. It has just two forces acting on it, its weight and air resistance. Which of the following statements is true?
  6. physics

    What does it mean to say the Coulomb Force is a conservative force?
  7. physics to be conceptualize

    Which of the following statements are FALSE?
  8. physics

    The work done by non-conservative forces is equal to the total change in kinetic and potential energy. True or False?
  9. physics

    Which one of these statements regarding non-conservative forces is FALSE?
  10. physics

    Which one of these statements regarding non-conservative forces is FALSE?

More Similar Questions