Biomechanics

Question 1

what is displacement

Answer 1

distance from start point to end point, eg around 400m track = 0

Question 2

what is velocity

Answer 2

displacement / time

rate at which an objects displacement changes position,

Question 3

what is acceleration

Answer 3

greater the velocity, greater the acceleration 
speeding up = positive acc
speeding down = negative 
constant speed = 0 acceleration
measured in m/s/s

Question 4

key to balance and stability

Answer 4

Centre of gravity - weight towards centre of object
Line of gravity - line drawn from centre of gravity to ground, if centred then more stable
base of support - wide base = more stability

Question 5

Fluid mechanics

Answer 5

Flotation. - objects ability to float determined by gravity and buoyancy
Fluid resistance - is drag force and occurs by friction between body’s surface and the fluid, minimise by streamlining their body shape

Question 6

how body applies force

Answer 6

primarily through the muscular system and the skeletal system

Question 7

how body absorbs force

Answer 7

force distributed over a large area hurt less than directed in a small area

changing the impact from direct to oblique, moving with the force eg tilting your head before punched

distributing force through flexing joints