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A 28 kg chair intially at rest on a horizontal floor requires a 360 N horizontal force to set it in motion. Once the chair is in motion, a 329 N horizontail force keeps moving it at a constant velocity. The acceleration of gravity is 9.81 m/s^2. What is the coefficient of static friction between the chair and floor?

  • physics -

    Why have you listed the subject as "Cleveland"?

    The static friction coefficient is the force reuired to start it moving, divided by M g.

    The kinetic friction coefficient is the force required to keep it moving at constant speed, divided by M g.

    M g in this case is 28 x 9.81 Newtons

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