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