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A 25 kg chair initially at rest on a horizontal floor requires 393 N horizontal force to set it in motion. Once the chair is in motion, a 301 N horizontal force keeps it moving at a constant velocity.
a) Find the coefficient of static friction between the chair and the floor.
b) Find the the coefficient of kinetic friction between the chair and the floor.

  • physics - ,

    Use the definitions to answer the questions:

    (a) coeficient of static friction =
    (force required to start motion)/weight

    (b) coefficient of kinetic friction =
    (force required to maintain constant velocity)/weight

    (Make sure you use weight = M*g)

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