biomechanics definitions

Question 1

linear motion

Answer 1

takes place through a linear pathway, either in a straight or curved line

Question 2

angular motion

Answer 2

takes place when an object turns about an axis of rotation

Question 3

general motion

Answer 3

combination of both linear and angular motion

Question 4

distance

Answer 4

path of a body as it moves from one location to another

Question 5

displacement

Answer 5

a measure of how far you finish from your start position in a set direction

Question 6

speed

Answer 6

movement from one point to another in the fastest possible time

Question 7

formula for distance

Answer 7

distance = speed x time

Question 8

velocity

Answer 8

the speed in a given time

Question 9

acceleration

Answer 9

the rate at which velocity changes

Question 10

angular distance

Answer 10

represents the sum of all angles as a body moves from its start position to its end position

Question 11

angular displacement

Answer 11

represents the difference in the angle between the start and end of the position of a body

Question 12

sub-maximal force

Answer 12

less than maximal force, generally used when accuracy is most important

Question 13

maximal force

Answer 13

result of perfect force summation, maximal muscle contraction and excellent technique

Question 14

simultaneously

Answer 14

when all body parts move at the same time to produce a force, generally used to produce accuracy, but also maximal power

Question 15

sequentially

Answer 15

when all body parts are moved in a sequence to produce a force, is generally used to produce maximally force in whole-body actions such as throwing or kicking

Question 16

balance

Answer 16

the ability to neutralise forces that disturb the equilibrium

Question 17

static stability

Answer 17

when an object is at rest and not moving with linear and angular motion

Question 18

dynamic stability

Answer 18

when an object is in motion and is moving in linear and angular motion

Question 19

centre of gravity

Answer 19

the point around which a body’s weight is equally balanced in all directions

Question 20

force

Answer 20

any push or pull action

Question 21

newtons first law

Answer 21

a body continues in a state of rest or state of motion unless acted upon by a force

Question 22

newtons second law

Answer 22

the rate of change of acceleration of a body is directly proportional to the force applied to it an dinve

Question 23

newtons third law

Answer 23

for every action force, there is an equal and opposite reaction force in terms of magnitude and direction

Question 24

inertia

Answer 24

the amount of resistance to a change in an object’s state of motion

Question 25

momentum

Answer 25

the quantity of motion posses by a moving object

Question 26

impulse

Answer 26

the change in momentum of an object