Physics

A 221-kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 27.7° with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.811, and the log has an acceleration of 0.876 m/s2. Find the tension in the rope.

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  1. forces upward: Tension+friction-gravity down
    but friction=mg*cosTheta*mu
    and gravity down=mg*sinTheta

    net force=mass*acceleration
    Tension+mg*cosTheta*mu
    - mg*sinTheta = mass*acceleration

    solve for tension

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    bobpursley

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