Centre of mass Flashcards
What is the center of mass?
The center of mass is the point around which the entire mass of an object is considered to be concentrated and balanced in all directions.
What is the difference between mass and weight?
Mass is the quantity of matter within a body, measured in kilograms (kg), while weight is the force due to gravity acting on that mass, measured in newtons (N).
How do the center of mass and center of gravity differ?
The center of mass is a point of mass concentration, while the center of gravity is the point where gravity acts. On Earth, due to a uniform gravitational field, they are typically the same.
What is equilibrium in biomechanics?
Equilibrium is when all forces acting on an object are balanced, resulting in a net force of zero.
What are some methods to determine the center of mass location?
Methods include the balance method, suspension method, reaction board method, and 3D optical motion analysis.
How does the center of mass change during movement?
The center of mass changes position during movement, affecting stability and motion. It can cause either linear translation or rotation depending on where the force is applied.
What factors influence stability?
Stability is influenced by the weight of the object, the height of the center of gravity, the size of the base of support, and the direction of the applied force.
What is dynamic balance?
Dynamic balance is the ability to maintain stability while in motion, such as walking or running.
Why is knowledge of the center of mass important in sports performance?
the center of mass can enhance athletic performance by optimizing body segment positions for specific actions, like the Fosbury Flop in high jump.
What happens when forces act through vs. off the center of mass?
Forces acting through the center of mass cause linear translation, while forces acting off the center of mass cause rotation.
