Principles Of Biomechanics

Question 1

What is biomechanics

Answer 1

Study of human movement from the perspective of art and sciences, the study of the mechanical laws relating to the movement or structure of living organisms

Question 2

What are we interested in for biomechanics

Answer 2

Motion force and response

Question 3

Kinematics is

Answer 3

The geometry of the motion of objects, including displacement velocity and acceleration without taking into account the force that produce the motion

Question 4

Kinetics is?

Answer 4

The study of the relationships between the force system acting on a body and the changes it produces in body motion

Question 5

Key principles

Answer 5

Statics/dynamics, kinematics/kinetics, scalars/vectors, qualitative/quantitative, newtons laws

Question 6

Static system is?

Answer 6

A system in a constant state of motion, at rest or moving with a constant speed and direction

Question 7

Dynamic system is?

Answer 7

Systems in which acceleration is present

Question 8

Qualitative

Answer 8

Measuring the quality of something , video analysis

Question 9

Quantitative

Answer 9

Measuring the quantity of something, force plates motion analysis, emg etc

Question 10

Kinematics/ kinesiology

Answer 10

Concerned with the description of motion as a function of space and time with no reference to causes of motion, stride length, athlete speed

Question 11

Kinetics

Answer 11

The relationship between the forces acting on a system and the resulting motion of the system, force between feet and ground, linear, torques, impulse, power

Question 12

Describe movement

Answer 12

Linear, angular, general (complex)

Question 13

Displacement is

Answer 13

A vector which points from the initial position of an object to its final position (m)

Question 14

Velocity is

Answer 14

Speed in a given direction metres per second

Question 15

Acceleration is

Answer 15

A vector which shows the direction and magnitude of changes in velocity metres per second per second
A= (v1-v2)/t

Question 16

Force is

Answer 16

A push or pull and it changes the motion of a body segment, f=m*a, internal and external forces, internal muscles, external friction air resistance thrust gravity

Question 17

Muscle forces - the amount of force is relative to what?

Answer 17

Body type and limb length, muscle fibre type, motor unit firing, pennation angle

Question 18

Newtons laws describe?

Answer 18

How things move

Question 19

Newtons 1st law

Answer 19

Law of inertia - Body at rest or moving at a constant velocity will continue in the same state unless acted on by an external force

Question 20

Newton’s second law

Answer 20

Acceleration- the acceleration of a body is in the same direction and is proportional to the force causing it and inversely proportional to the mass of the body f=m*a

Question 21

Mass

Answer 21

Quantity of matter measured in kg, mass is not the same as weight, mass is a measure of inertia

Question 22

Weight is

Answer 22

Measured in newtons. F= m* gravity (9.8)

Question 23

Newtons 3rd law

Answer 23

Reaction - for every force exerted by one body on another there is a concurrent force equal in size but opposite in direction exerted by the second body on the first