Please help? physics question?

Posted on 2014-12-13 08:06:00 in Physics by RUBY

A 28 kg chair initially at rest on a horizontal
floor requires a 361 N horizontal force to set
it in motion. Once the chair is in motion, a
327 N horizontal force keeps it moving at a
constant velocity. The acceleration of gravity is 9.81 m/s^2.

a) What is the coefficient of static friction
between the chair and the floor?

b) What is the coefficient of kinetic friction
between the chair and the floor?

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