kinesiology + biomechanics
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Newtons first law
object at rest or moves at constant momentum unless external force acts upon it
Newton 2nd law
f = m x a
newtons 3rd law
every action has an equal and opposite reaction
LINEAR MOTION displacement (x)
change in position (x) m
LINEAR MOTION MOMENTUM (p)
mass X velocity kg.m.s-1
LINEAR MOTION VELOCITY (V)
change in position(x) / change in time(t) m.s-1
LINEAR MOTION ACCELERATION (A)
change in velocity(v) / change in time (t) m.s^2
LINEAR MOTION FORCE (F)
mass x acceleration kg.m.s-2 = N
LINEAR MOTION IMPULSE (IMP)
force X time = change in momentum (p) kg.m.s-1 = N.s
LINEAR MOTION KINETIC ENERGY (KE)
1/2 X mass X velocity^2 J
ANGULAR MOTION Newtons 1st law
an object will stay in constant ANGULAR MOMENTUM unless external TORQUE acts upon it
ANGULAR MOTION Newtons second law
TORQUE = total moment of inertia x angular acceleration
ANGULAR MOTION Newtons 3rd law
if first objects exerts torque on second object second object will react with equal torque and magntiude in opposite direction
ANGULAR MOMENTUM moment of inertia
(mass x distance^2) kg.m^2
ANGULAR MOMENTUM angular displacement
change in angle rad
ANGULAR MOMENTUM angular velocity (w)
change in angle / change in time rad.s^-1
ANGULAR MOMENTUM angular acceleration
change in angular velocity / change in time rad.s^-2
ANGULAR MOMENTUM angular momentum (h)
moment on inertia (i) x angular velocity (w) kg.m^2.s^-1
ANGULAR MOMENTUM torque
moment of inertia x angular acceleration N.m
ANGULAR MOMENTUM angular impulse
torque x change in time = angular momentum N.m.s
ANGULAR MOMENTUM kinetic energy
1/2 x moment of inertia x angular velocity ^2 J
what are the symbols for : 1) linear velocity 2) linear acceleration 3) linear momentum 4) linear force 5) linear impulse 6) linear kinetic energy
1) v 2) a 3) p 4) f 5) imp 6) ke
what are the symbols for: 1) angular velocity 2) angular acceleration 3) angular momentum 4) torque 5) angular impulse 6) angular kinetic energy
1) w 2) a 3) h 4) T 5) Imp 6) Ke
CIRCULAR MOTION arc length (s)
s = rθ