Explore BrainMass

Explore BrainMass

    Angular Speed of a Pencil

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    A pencil, 15.7 cm long, is released from a vertical position with the eraser end resting on a table. The eraser does not slip. Treat the pencil like a uniform rod. What is the angular speed of the pencil just before it hits the table?

    a) 13.7 rad/s
    b) 7.23 rad/s
    c) 24.5 rad/s
    d) 16.8 rad/s

    © BrainMass Inc. brainmass.com June 3, 2020, 7:55 pm ad1c9bdddf
    https://brainmass.com/physics/energy/angular-speed-pencil-116775

    Solution Preview

    A uniform rod of mass M and length r rotating about its end has a moment of inertia:
    I = 1/3* M*r^2

    The kinetic energy of rotation with angular speed w ...

    Solution Summary

    The solution calculates the angular speed of a dropped pencil.

    $2.19

    ADVERTISEMENT