2022-11-03T08:17:15+03:00[Europe/Moscow] en true <p>List the six classic <strong>simple machines</strong></p>, <p><strong>Mechanical advantage</strong> is the ratio of magnitudes of the force _____ to the force _____.</p>, <p>Mechanical advantage equation</p>, <p>Applying a lesser force over a greater distance to achieve the same change in position (displacement) accomplishes the _____.</p>, <p>Free body diagram of a simple two-pulley system</p>, <p>All simple machines can be approximated as conservative systems if we ...</p>, <p>The ideal pulley is _____ and _____. </p>, <p>Real pulleys—and all real machines, for that matter—do not ...</p>, <p>Efficiency of a machine equation</p>, <p>The percentage of the work put into the system that becomes unusable is due to _____ or _____ forces.</p>, <p>System of six pulleys</p><p>1. What would be the force required to raise the weight?</p><p>2. What would be the displacement of the rope?</p> flashcards

MCAT Physics and Math 2.3: Mechanical Advantage

MCAT Physics and Math 2.3: Mechanical Advantage

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  • List the six classic simple machines

    inclined plane

    wedge

    wheel and axle

    lever

    pulley

    screw

    (Of these, the inclined plane, lever, and pulley are most frequently tested on the MCAT.)

  • Mechanical advantage is the ratio of magnitudes of the force _____ to the force _____.

    exerted on an object by a simple machine (Fout)

    actually applied on the simple machine (Fin)

  • Mechanical advantage equation

    Units = dimensionless (ratio of two forces)

    Units = dimensionless (ratio of two forces)

  • Applying a lesser force over a greater distance to achieve the same change in position (displacement) accomplishes the _____.

    same amount of work

  • Free body diagram of a simple two-pulley system

  • All simple machines can be approximated as conservative systems if we ...

    ...ignore the (usually) small amount of energy that is lost due to external forces, such as friction.

  • The ideal pulley is _____ and _____.

    massless and frictionless

  • Real pulleys—and all real machines, for that matter—do not ...

    ... achieve 100 percent efficiency in conserving energy output to input.

  • Efficiency of a machine equation

  • The percentage of the work put into the system that becomes unusable is due to _____ or _____ forces.

    nonconservative or external forces.

  • System of six pulleys

    1. What would be the force required to raise the weight?

    2. What would be the displacement of the rope?

    1) 1/6 * mg2) 6*L

    1) 1/6 * mg

    2) 6*L