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GM Biomechanics > Quiz 1 > Flashcards

Flashcards in Quiz 1 Deck (58):
1

What is the objective in biomechanics

To understand the loading condition of tissues and their mechanical responses

2

What is the study of forces and their effects

Mechanics

3

What branch of mechanics deals with the geometry of the motion of objects (including displacement, acceleration, velocity)

Kinematics

4

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

Kinetics

5

What uses the principles of mechanics for solving problems related to structure and function of biologic and physiologic systems

Biomechanics

6

What biomechanical quantitative analysis deals with magnitude only

Scalars

7

What does scalars measure

Distance, speed, mass

8

What biomechanical quantitative analysis deals with magnitude and direction

Vectors

9

What do vectors measure?

Displacement, velocity, accel, weight, momentum, and force

10

What are vectors graphically represented by

Arrows

11

Is distance a scalar or vector quality

Scalar

12

Is distance a scalar or vector quality

Vector quality

13

What deals with how much ground an object has covered during its motion

Distance

14

What determines how far out an object is and an overall change in position

Displacement

15

Is speed a scalar quantity or a vector quality

Scalar

16

Is velocity a scalar quantity or a vector quality

Vector

17

What is speed

How fast an object is moving

18

What is velocity

The rate at which an object changes its position

19

How do you maximize velocity

Must maximize the amount displaced from original position

20

Is speed or velocity ignorant of direction

Speed

21

Is speed or velocity direction aware

Velocity

22

What is the equation for speed

Distance/time = rate at which an object covers distance

23

What is the equation of velocity

Displacement/time

24

Rate of displacement =

Rapid amplitude = short depth

25

Why is velocity important with chiropractic

HVLA.= high velocity, low amplitude

26

What is acceleration

The rate at which an object changes its velocity

27

What is the equation for acceleration

Change in velocity/time

28

What has to do with changing how fast an object is moving

Acceleration

29

What type of biomechanical quantity is acceleration

Vector quantity

30

The direction of the acceleration vector depends on what two things

-whether an object is speeding up or slowing down
- whether an object is moving in the + or- direction

31

What type of quantity is mass

Scalar

32

What type of quantity is weight

Vector quantity

33

What refers to the amount of matter that is contained by the object

Mass

34

What is the force of gravity upon that object

The weight

35

Gravitational attraction between two bodies changes when what is changed

The distance between their centers (farther = less attraction)

36

What quantity is momentum

Vector quantity

37

What is momentum

Mass in motion, quantitiy of motion an object possesses

38

What is the equation of momentum

Mass * velocity or p=m*v

39

Double the mass = ___ the momentum

Double the momentum

40

What is force measured in

Newtons (N)

41

What quantitiy is force

Vector

42

What is an action (push or pull) upon a body causing it to deform or move

Force

43

What is the equation for mass

Mass*acceleration = force

44

What do we have to do to increase force

Either increase mass or the acceleration, if you increase both then force greatly increases

45

What is newtons first law of motion

The law of inertia

46

What is resistance to having its state of motion changed by application of a force

Inertia

47

A system in equilibrium is either at rest or what

Moving with constant velocity

48

What is the law of inertia

An object at rest stays at rest and an object in motion stays in motion with the same speed and in direction unless acted upon by an unbalanced force

49

What is newtons second law of motion

Law of force and acceleration

50

What is the law of force and acceleration

The acceleration of an object depends directly upon the object and inversely upon the mass of the object

51

What is newtons 3rd law of motion

Law of action and reaction

52

What is the law of action and reaction

For every action there is an equal and opposite reaction

53

Forces always come how within newtons 3rd law

Always in pairs - equal and opposite action-reaction force pairs

54

How does newtons second law relate to the third law

Although every action force is met with an equal and opposite reaction force, every action does not produce an equal and opposite reaction

55

What is the intesity of force perpendicular to the surface on which it acts

Normal stress

56

What is the intensity of force parallel to the surface on which it reacts

Shear stress

57

What is static friction

When 2 contacting surfaces are not sliding relative to eachother but posses the potential for movement

58

What is the ratio required to initiate a sliding motion between two bodies

Coefficient of friction