1. A 24 kg crate initially at rest on a horizontal floor requires a 75 N horizontal force to set it in motion. Find the coefficient of static friction between the crate and the floor.

1. Once the crate in question 1 is in motion, a horizontal force of 53 N keeps the crate moving with a constant velocity. Find k, the coefficient of kinetic friction, between the crate and the floor.

1. A 25 kg chair initially at rest on a horizontal floor requires a 165 N horizontal force to set it in motion. Once the chair is in motion, a 127 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 coefficient of kinetic friction between the chair and the floor.