Lectures 1-4 Flashcards
Definition of biomechanics
The study of the mechanical laws relating to the movement or structure of living organisms
What are the three planes of motion? And how do they divide the body?
Sagittal (left and right)
Transverse (superior and inferior)
Frontal (front and back)
What are the three axes of rotation?
Longitudinal axis
Transverse axis
Frontal axis
How many mm in a cm?
10mm = 1cm
How many mm in a metre?
1000mm = 1m
How many metres are in a mile?
1600
How do you convert units? (Look at page 4, lecture 2 to make more sense of it)
Example:
Work out how many of X go into Y, then times Y by that amount.
Do that for both bits of the equation
Definition of distance
The total ground covered between two points
Definition of displacement
It is the shortest straight line route from the starting position to the final position
Definition of speed
It is the distance traveled per unit of time
Definition of acceleration
It is the rate of change of velocity per unit of time
What is the equation for speed?
Speed = distance/time
What is the equation for pace?
Pace = time/distance
What is the equation for velocity?
Velocity = displacement/time
What is the equation for acceleration?
Acceleration = change in velocity / change in time
Terms for displacement
/_\S or S or d
Terms for initial velocity
Vi (small i)
Or
U
Terms for final velocity
Vf (small f)
Or
V
Terms for acceleration
a
Term for /_\time
t
What does /_\ (triangle) mean?
A change in something
Definition of gravity?
Gravity is a force that attracts two masses together
What is the gravitational pull of the earth?
9.8m/s2
That’s 9.8 metres per second squared
If something is travelling towards the earth then it is negative
What is the velocity of an object an the apex?
The vertical velocity is 0
What do you use to find the Y (vertical) component in trigonometry? (Look at slide 17, lecture 4 to explain, may have the recap this lecture)
Sin
What is the equation for Sin?
Sin(60degrees) = opposite/hypotenuse
What trigonometry do you use to find the x (horizontal component)
Cos(60degrees) = adjacent/hypotenuse
What is the equation to work out the tangent (tan) in SOHCAHTOA?
Tangent = opposite/adjacent
Do all maths sheets
Lectures 1-4
