Question: 1. (a) Find the work done in compressing the spring from x = 0 to x = 1 and in compressing the spring from x = 4 to x = 5.
(b) Which of the two answers is larger? Why?
2. A circular steel plate of radius 20 ft lies flat on the bottom of a lake, at a depth of 150 ft. Find the force on the plate due to the water pressure.