Biomechanics - intro Flashcards
What does kinematics refer to?
movement
What does kinetics refer to?
forces
What is displacement measured in?
metres
(m)
What is the equation for displacement?
final position - initial position
What is velocity measured in?
metres/second
(m/s)
What is the equation for velocity?
change in displacement / time taken
What is acceleration measured in?
metres/second squared (m/s2)
What is force measured in?
newtons
(N)
Define force
the pushing or pulling action that one object exerts on one another
What is Newtons first law?
an object either remains at rest or continues to move with constant momentum, unless acted upon by a net force
What is Newtons second law?
the rate of change of momentum of a body is proportional to the force causing it and the change takes place in the direction in which the force acts
What is the equation for force?
mass x acceleration
(F = MA)
What is weight measured in?
newtons
(N)
What is weight?
the force due to gravity
What is the equation for weight?
mass x acceleration due to gravity (9.81 m/s2)
What is newtons third law?
every action has an equal and opposite reaction
What is ground reaction force (GRF)
the reaction force applied by the ground to the body
What does a force platform measure?
ground reaction force (GRF)
What is centre of mass?
the conceptual point where all the mass of a body can be considered to be concentrated
What is the equation for moment?
force x perpendicular distance
What is the equation for aperture?
focal length / diameter of hole
