A crate is resting on the back of a truck and has a coefficient of of friction of 0.45. What is the maximum acceleration that the truck can undergo before the crate starts to slide off the back of the truck.

Answer 1

µ = f / N, where µ is the coefficient of friction, f is the amount of force that resists motion, and N is the normal force

f=µN
ma=µmg
cancel m on both side:
a=µg

http://ffden-2.phys.uaf.edu/211_fall2002.web.dir/ben_townsend/staticandkineticfriction.htm

Answer 2

THANKS A MILLION. Tutocat.