How does useful work differ from actual work? For what kind of systems are these two identical?
Revolve feature and assembly basics Following the instructions from lecture 7 we have created this sketch which we then extrude this sketch to 0.250 inches and move on to the next part needed for out first assembly, which is making a piston head using the revolve feature. (all the dimensions are in inches) To start making the piston head using the revolve feature, first make a sketch of a section of the radius of the piston like this. When you have this sketch click on the revolve feature, which is on the drop down menu of the extrude feature. Select the sketch and specify the vector you want to rotate, in this case we are going to use the y-axis as a vector and set the limit of degrees to 360 so it make a full
