Three horizontal forces act on a box along the same straight line. A force of 25 N acts to the east, a force of 40 N acts to the west and a force of 15 N acts to the east. Which statement about the box is correct?
The resultant force is 0 N, so the box cannot be moving at all.
The resultant force is 80 N to the west, so the box speeds up.
The resultant force is 30 N to the east, so the box speeds up.
The resultant force is 0 N, so the box may move at a constant speed.
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.