This work sheet is to practice calculations using the F=ma formula. It gives 3 questions, each of which calculate 1 of F, m or a 3 times each. The wording changes the order in which the data is described eg for calculating F, one question gives a first then m, a second question gives m first etc. 1 in 3 questions uses grams instead of kg, so requiring a conversion calculation. 10 (numerically different) versions of each question are given - so the questions could be used as homework or revision and then the same questions, with different numbers, could be used in a classwork or test. Or, different versions could be handed out to different pupils if there was danger of copying of answers. Or both, given there are 10 versions. Each set has an ID number to easily find the correct answers for each version. All answers are given to 3 sf.