posted by Anonymous .
A 23 kg chair initially at rest on a horizontal
ﬂoor requires a 370 N horizontal force to set
it in motion. Once the chair is in motion, a
332 N horizontal force keeps it moving at a
The acceleration of gravity is 9.81 m/s
a) What is the coeﬃcient of static friction
between the chair and the ﬂoor?