Hello everyone, I was reading a physics book and found an exercise. This time I faced with a really strange one! I can't find out what I am doing wrong! I am really good at physics and math, but sometimes I fail as many people do... The answer in the book says ~0.4m, but I am unable to get it (instead of it, I get ~ -0.4m) I am attaching a Word document with my solution. I will be looking forward to getting the right solution!