Introduction to Kinesiology Flashcards Preview

PTRS 711 Exam 1 > Introduction to Kinesiology > Flashcards

Flashcards in Introduction to Kinesiology Deck (27):
1

Kinematics

Study of movement related to displacement, velocity & acceleration

2

Velocity

Change in distance/change in time

3

Acceleration

Change in velocity/change in time

4

Kinetics

Movements in terms of force

5

Impulse and Momentum

Forces applied over a period of time

6

Work and Energy

Forces applied over distance

7

Force

Mass x acceleration

8

Vector

Forces that act on a lever

9

Vector Characteristics

Magnitude
Direction
Point of application
Line of application

10

Force Types

Gravity
Shear
Tensile
Compressive

11

Gravity

Always vertically down
Mass x gravital acceleration

12

Shear

Coplanar, in opposite direction
(blister)

13

Tensile

Colinear, in opposite direction
(ligament strain)

14

Compressive

Colinear, in similar directions push together
(meniscus)

15

Newton's First Law

Inertia - Equilibrium
Body at rest will stay at rest

16

Newton's Second Law

Acceleration
Particle subjected to resultant force will accelerate in direction of force and magnitude of acceleration will be proportional to force of magnitude

17

Newton's Third Law

Action/Reaction
For every action, there is an equal and opposite reaction

18

Moment (Torque)

Application of force at a distance from pivot point that cause rotation around a stationary point
Force x Distance

19

Levers

Increase or decrease mechanical advantage

20

Mechanical Advantage

Force arm divided resistance arm

21

First Class Lever

FAR
Seesaw

22

Second Class Lever

ARF
Wheelbarrow

23

Third Class Lever

AFR
Tweezers

24

Pulley

Improve line of pull or mechanical advantage
Could be fixed or movable

25

Fixed Pulley

MA=1
Pulley wheel only rotates

26

Movable Pulley

MA=2
Pulley rotates and translated
1 pulley = 1/2 force
2 pulleys = 1/4 force

27

Cams

Non-uniform ellipses used to increase MA
Allows for variable resistance to match the length-tension relationship