exam - biomechanics Flashcards
linear motion
straight line
momentum
mass x velocity
newtons 1st law
an object will remain at rest unless acted upon by a force
newtons 2nd law
acceleration - force applied will produce a change in motion
newtons 3rd law
action- for every action there is a equal and opposite reaction
external forces that act upon an object/body
- gravity
- mass
- force
- acceleration
angular motion
angular motion involves rotation around a central axis or a fixed point. examples are : twirling in ice, skating or doing a pivot in netball
displacement
change of position of a body, the start and finish are the same, therefor resulting in 0 displacement
factors affecting path of projectile
height of release
speed of release
height of release
what can be done to increase stability
- body mass
- friction between body/surface
- base of support
- position of the centre of gravity
spins
top - causes the ball to drop more quickly that it would without spin
back - floats, has lower length and distance
side - curves, follows a curved path
summation of momentum
the sequential and coordinated movement of each body segment to produce maximum velocity
projectile motion
an airborne body that is affected by the forces of gravity one air resistance, anything that is launched into the air and affected only by the forces of gravity and air resistance can be considered projectile, factors influencing flight path
torque
the turning effect of a force, torque is the tendency of an object to rotate
force x lever arm force
greater the torque = greater the angular acceleration
inertia
refers to the resistance of a rotating object to change its state of motion, the tendency of an object to resist change in its state of motion
