Mechanics is the study of motion forces and energy

discussion summary practice problems

Mechanics is the study of motion, forces, and energy


  • Motionis the action of changing location or position.
  • forceis any interaction that causes a change in motion, shape, or energy.
  • A system possesses energyif it has the ability to do work.
    (Work is done when a force causes a change in the energy of a system.)
  • Mechanics can be divided into sub-disciplines.
    • Kinematicsis the branch of mechanics that deals with motion without regard to forces or energy.
    • Dynamicsis the branch of mechanics that deals with motion and forces
    • Staticsis the branch of mechanics that deals with forces in the absence of changes in motion or energy.
    • The work-energy theoremis the central principle of mechanics that relates forces and energy.
    • The conservation of energyis the central principle of science that deals with energy in all of its forms.
    • Kinetic energyis the term that refers to all forms of energy due to motion.
  • There are several types of motion…
    • Translationalmotion results in a change of location.
    • Oscillatorymotion is repetitive and fluctuates between two locations.
    • Rotationalmotion occurs when an object spins.
    • Randommotion is unpredictable in practice or theory.

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