s centre of gravity, regardless of the body's orientation. This point is where the entire weight of the body can be considered to act."},{"text":"Centre of mass","correct":false,"explanation":"Centre of mass is a related idea and is tempting because it describes how mass is distributed, but the question asks specifically about the point through which weight acts: the centre of gravity."},{"text":"Point of rotation","correct":false,"explanation":"The point of rotation describes where a body turns, such as a joint or pivot, not where its weight acts. The correct point for the body’s weight is the centre of gravity."},{"text":"Centre of pressure","correct":false,"explanation":"Centre of pressure is the point where a resultant contact force acts, often on a surface or foot. It is different from the point through which a body’s weight acts, the centre of gravity."}]},{"id":"0216cf73-aeba-4e80-91e0-4fd1dc6851cd","cardType":"basic","front":"State three ways to increase an athlete's stability.","back":"

Widen the base of support
Lower the centre of gravity
Keep the line of action of weight inside the base

","points":3,"mcqOptions":[{"text":"

Widen the base of support
Lower the centre of gravity
Keep the line of action of weight inside the base

","correct":true,"explanation":"Stability increases when the base is wider, the centre of gravity is lower, and the weight’s line of action remains within the base. These changes make toppling less likely."},{"text":"

Narrow the base of support
Raise the centre of gravity
Keep the line of action of weight inside the base

","correct":false,"explanation":"A narrow base and a higher centre of gravity make toppling easier, although keeping the weight’s line inside the base helps. Stability is increased by widening the base and lowering the centre of gravity."},{"text":"

Widen the base of support
Raise the centre of gravity
Keep the line of action of weight outside the base

","correct":false,"explanation":"Raising the centre of gravity and moving the weight’s line outside the base both reduce stability. The line must remain inside the base, while a lower centre of gravity is more stable."},{"text":"

Narrow the base of support
Lower the centre of gravity
Keep the line of action of weight outside the base

","correct":false,"explanation":"A narrow base and a weight line outside it make an athlete more likely to topple, despite the lower centre of gravity. Stability requires a wide base and the line inside it."}]}]}],"examCountdown":{"examDate":"2027-05-21","paperLabel":"Component 1"},"heading":"Option C: The Physics of Sports","title":"Option C: The Physics of Sports Flashcards","topicSidebar":"$L40"}]}],"topicId":"fa57f3f9-dbc9-5d9e-aa02-7be2ce66d47c","walled":"$L41"}],"$L42"]