WEEK 1 Flashcards
define mechanics
the branch of physical sciences that deal with the response of bodies to the action of forces
define biomechanics
the mechanics of physics of human movement
what are the 2 major sub branches of mechanics
1- statics
2- dynamics
define statics and give an example
def= equilibrium of a system. this system has no motion or a constant motion.
eg= something that is not moving eg people lying on the beach
define dynamics
motion of a system. this system is subject to acceleration
what are the sub categories of kinematics
1) LINEAR:
- position
- velocity
- acceleration
2) angular:
- position
- velocity
- acceleration
what are the sub categories for kinetics
1) linear:
- force
2) angular :
- torque
define kinematics
describes how the velocity and acceleration of a body changes with TIME and changes with the position of the body
define kinetics
study of the relationship between the motion and FORCE that cause the motion.
- explains why things move in the first place.
what are the 3 fields of biomechanics studies and describe them
1) biomedical= identification of injury mechanism
2) occupational= design of work - related machines
3) sport= improving athletic performance
define qualitative biomechanics analysis
description of the quality of movement
- informing athlete of their technique
define quantitative biomechanics analysis
description of the movement using numbers
eg the angle of the trunk compared to the angle of the thigh
describe what analysis are used for (x2)
- monitor any changes in the athletes technique
- monitor progress in rehab
what did Leonardo da Vinci do
created detailed drawings and depictions of the body
what did Giovanni Alfonso Borelli do
- first person to figure out that muscles contract eg where muscles are pulling on levers
what did murbridge do
captured motion analysis
what did marey do
- expose multiple frames on the one picture
what did historical figure hill do
- length tension relationship in muscles
what did Haye do
founder of sports biomechanics
define the unit of measurement- fundamental quantities
def= cannot be defined in terms of other physical quantities.
eg length and mass
define the unit of measurement- derived quantities
defining operations based upon measurement of fundamental quantities
eg area, velocity
define distance
length of the path from a to b
define displacement
length of straight path from a to b
define a vector
has both a magnitude and a direction
define a vector resolution
breaking down into perpendicular components.
- resultant= the resolution, what happened in the end
