A net external force F F\,F acts on a moving tennis ball. Which of the following changes cannot occur as a direct result of this force?
a change in speed
a change in shape
a change in mass
a change in direction of motion
183 exam-style questions on CIE IGCSE Physics 1.5.1a Forces, resultant force and motion. Each one has a worked solution and a mark scheme showing where the marks go.