A swimmer pushes water backwards. The water exerts a forward force on the swimmer.
State the Newton's law illustrated by this pair of forces.
Explain why these two forces do not cancel.
The swimmer moves at constant velocity. What can be concluded about the resultant force on the swimmer?
49 exam-style questions on OCR (MEI) A Level Maths 3.5 Newton's Laws of Motion, covering 3.5.1 Meaning of Newton's three laws, 3.5.2 Equation of motion, 3.5.3 Equation of motion for a particle in a straight line, 3.5.4 Model a system of connected particles, 3.5.5 Equations of motion for individual particles, 3.5.6 System with no relative motion as a single particle, and 3.5.7 Equation of motion in a straight line or plane (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.