A force of 9.0 N acts due east on an object. A force of 12.0 N acts due north on the same object. A scale vector diagram is drawn. What is the magnitude of the resultant force on the object?
3.0 N
7.9 N
15.0 N
21.0 N
40 exam-style questions on AQA GCSE Physics 5.1 Forces and their interactions, covering 5.1.1 Scalar and vector quantities, 5.1.2 Contact and non-contact forces, 5.1.3 Gravity, and 5.1.4 Resultant forces. Each one has a worked solution and a mark scheme showing where the marks go.