kinetic friction is 0.400 , and the crate is polied 4.90 m (a) How much work is done by the gravitational force on the crate? (b) Determine the incresse in internal energy of the crate-indine matem owing to tricton. (c) How much work ia dene by the s8:N force en the crage? (a) What is the change in winetic ehergy of the crate? (c) What is the speed of the crate after being pulled 4.90 m ? m/s