A delivery robot is modelled as a particle moving with constant acceleration on a straight path. Measurements show that its acceleration decreases as its battery voltage falls.
State which assumption is contradicted by the measurements.
Suggest one refinement to the model.
8 exam-style questions on OCR (MEI) A Level Maths 3.1.1 Language of simplifying assumptions. Each one has a worked solution and a mark scheme showing where the marks go.