P1 - Biomechanics Flashcards
what is linear motion?
Linear motion is movement of a body in a straight or curved line, where all parts move the same distance, in the same direction, over the same time
how is linear motion achieved?
A direct force to a body’s centre of mass
what is angular motion?
Angular Motion is the movement of a body or part of a body in a circular path about an axis of rotation
how is angular motion achieved?
Angular motion results from an eccentric force being applied to a body, OUTSIDE of the centre of mass
What are the Axis of rotation?
Longitudal, transverse, frontal
What is the angular momentum equation?
moment of inertia x angular velocity
What is moment of inertia?
What is angular velocity
Moment of Inertia is the resistance of a body to change its state of angular motion or rotation.
Velocity the object is rotating at
What factors affect the moment of inertia?
Mass as the greater the mass of the body the greater the moment of inertia.
The distribution of mass from the axis rotation
What factors affect drag and air resistance?
velocity
Surface characteristics, smooth or rough
Shape and streamlining
Front cross sectional area
What factors affect projectile motion?
Speed of release
Angle of release
Height of release
Aerodynamics (Bernoulli & Magnus)
what is lift force
Lift force is an additional force created by a pressure gradient forming on opposing surfaces of an aerofoil moving through a fluid or the air
how does the magnus affect work?
Applying spin (magnus force) to a projectile will create greater air resistance in a particular direction. This decreases air velocity, increasing pressure on this side.
