1. A crate is pulled a distance of 5 meters along a surface that gets pro- gressively smoother. The force, in Newtons, needed to keep the crate moving is given by the function F(x), where x is the position of the crate, in meters (see figure). Use a middlesum with n = 5 to estimate F 10 8 6 F(x) dx, which gives the total work done in moving the crate, and 4 include the proper units with your answer. 2 4

1. A crate is pulled a distance of 5 meters along a surface that gets pro- gressively smoother. The force, in Newtons, needed to keep the crate moving is given by the function F(x), where x is the position of the crate, in meters (see figure). Use a middlesum with n = 5 to estimate F 10 8 6 F(x) dx, which gives the total work done in moving the crate, and 4 include the proper units with your answer. 2 4