Over the past years I have had several requests for the answers to all the questions on the activities, well I've started to publish them. Activity answers . I'm doing them on my ipad and I'm afraid my handwriting is a bit untidy but hopefully will improve with practice.

I've started at the point that my students are at right now (1st yr circular motion, 2nd yr nuclear) and I'll work forwards before going back to the beginning. I think these will be particularly useful for revision and catching up when a student misses some classes.