Ashopper in a supermarket pushes a cart with a force of 35ndirected at an angle of 25 degrees below the horizontal. the force is just sufficient to overcome various frictional forces, so the cart moves at a constant speed.

a. find the work done by the shopper as she moves down a 50.0mlength aisle.
b. what is the net work done on the cart? why?
c. the shopper goes down the next aisle, pushing horizontally and maintaining the same speed as before. if the work done by frictional force doesn't change, would the shopper's applied force be larger, smaller, or the same? what about the work done on the cart by the shopper?

Find the steady-state temperature at the center of the plate = /2, = /2) for sums of w from n=1 to n=19 (only odd values). find the value of n for which the change in /2, /2) is less than 1% from the value at the previous n. at this point, we consider the solution converged. does the value of the temperature at the center seem reasonable? in this part, the values of x and y are constant scalar values. you should produce a plot of the value of n on the horizontal and the estimate of the temperature at the center of the plate on the vertical. b. using the value of n (or larger) that resulted in convergence in part (a), create a contourf plot of the temperature distribution across the entire plate. use enough spatial subdivisions to create a useful plot. comment on the results. hint: you need to determine what “x” and “y” values to use to make your t matrix. i recommend using a different number of x and y values. use enough x and y values so that the plot is “smooth”.