Hi, I have just started A-level physics and bought the Letts AS/A2 study guide from which I am working. However I have gotten stuck right at the beginning! Please can someone figure this out with an explanation? Also any recommendations on good but concise textbooks? I was thinking of buying Physics for Dummies. 1. A van is travelling north at a speed of 28ms. After turning a corner it is heading 40 degrees east of north at 25ms. Work out the change in velocity of the van Thanks!