Hello,

Still practicing for the exam... Now I have something weird going on with the mass of my part. On question 1 it looks I get the mass correct. On question 2 it just asks to change some dimensions, so I open up the equations and change the dimensions that it wants changed - now my mass doesn't match the answer to question 2. But the weird part is this - I change the dimensions back to how they were in question 1 and the mass no longer matches the answer to question 1...

For example, dimension A is 213 mm - I can change it to something (say 250) then back to 213, now the mass doesn't match what it was before I changed it to 250 (when it was 213 the first time). I can keep doing this and an A dimension of 213 always yields a different mass after changing it from something else.

Anybody know what is happening?