A 5kg crate rests on a horizontal floor. The coefficient of kinetic friction between the crate and the floor is 0.20. A worker pulls the crate horizontally with a steady force of 30N toward the east. Taking g=9.8m/s2, calculate the magnitude of the crate’s acceleration.
a) 6.0m/s2
b) 3.1m/s2
c) 4.0m/s2
d) 2.0m/s2