Kin Biomechanics Flashcards
Force
Push or pull action that can be represented as a vector
vector
quantity that has both magnitude and direction
push a wheelchair, one pushes it with a certain speed and certain direction
velocity
vector that describes speed and is measured in units such as f/s or m/h
scalar
quantity that measures only magnitude
like length, area, volume, and mass
mass
amount of matter that a body contains
inertia
property of matter that causes it to resist any change of its motion in either speed or direction
Is mass a measure of inertia?
yes, its a measure of its resistance to a change in motion
torque
tendency of force to produce rotation around an axis
friction
a force developed by two surfaces, which tends to prevent motion of one surface across another.
3 laws of Newton
Law of inertia
Law of acceleration
Law of action reaction
(iaa)
Law of inertia
an object at rest tends to stay at rest and an object in motion tends to stay in motion
Law of acceleration
the amount of acceleration depends on the strength of the force applied to an object
(how fast it go, depends on how hard it hit!)
Law of action reaction
for every action there is an equal and opposite reaction
Linear force
two of more forces are acting along the same line
parallel forces
occur in the same plane and in the same or opposite direction.
