Once a 24 kg crate is in motion on a horizontal floor, a horizontal force of 57 N keeps the crate moving with a constant velocity.
The acceleration of gravity is 9.81 m/s2 .
What is μk, the coefficient of kinetic fric- tion, between the crate and the floor?
the weight of the crate is 9.81 * 24 = 235.44 N
Now you can find µk