Practice 10.1.1. Describe friction. with authentic IB Sports, exercise and health science (SEHS - Old) exam questions for both SL and HL students. This question bank mirrors Paper 1, 2, 3 structure, covering key topics like core principles, advanced applications, and practical problem-solving. Get instant solutions, detailed explanations, and build exam confidence with questions in the style of IB examiners.
What is friction?
I. A force that acts parallel to two surfaces in contact
II. A force that opposes relative motion
III. A force that acts through the centre of mass
Which opposing force reduces the motion parallel to the interface of two surfaces in contact?