This book contains 20 investigations. Each one is based around a mechanics topic and should be taught alongside lessons where problem solving is rehearsed. Each investigation takes somewhere between one and three hours to complete. Each investigation has been tested on several classes of A-level students. Most of these experiments require no technology and can be taught with little more than a few weights, some string and a box of stopwatches. Many schools are finding that much of their physics apparatus budget over the last twenty years has been spent on data loggers that are now incompatible with modern computers. These experiments can be conducted with next to no kit. Perhaps the most rewarding thing about these experiments is that they were enjoyed by the students. Physics isn't physics unless things are flying across the room, popping up in the air or vibrating away noisily in a corner. These experiments make mastering physics fun.