Biomechanics - Calculations, Centre Of Mass And Stability Flashcards
Define force
A push or pull that usually effects the state of motion of an object
Define momentum
The amount of motion possessed by a moving object
Define acceleration
The rate of change in velocity
Define weight
The gravitational force that the earth exerts on the mass of a body
How do you work out force?
What is the unit for force?
FORCE = mass x acceleration
Newtons (N)
How do you work out momentum?
What is the units for momentum?
Momentum = mass x velocity
Kilogram metres per second (Kgm/s)
What are the two formulas for acceleration?
What is the unit for acceleration?
- Acceleration = force / mass
- Acceleration = change in velocity / time
- Meters per second (m/s)
What is the formula for weight?
What is weight measured in?
Weight = mass x gravitational field strength
Measured in kilograms (Kg)
Define centre of mass
The centre of mass is the point at which a body is balanced in all directions and from which weight appears to act
What are the two factors that effect the centre of mass
Shape
Density of different parts of the body
Where is the centre of mass of a regular shape and density
The centre of mass will be in the centre of the object
Where must the centre of mass be
The centre of mass must be where the mass is balanced around it in all directions
Define stability
Stability is a measure of how easily an object is moved from a position of equilibrium or balance
Define line of gravity
Line of gravity is an imaginary line extending vertically downward to the ground from the centre of mass
Define base of support
The base of support is the area enclosed by the points of contact with the ground
