Basics and Terminology 3 Flashcards Preview

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Flashcards in Basics and Terminology 3 Deck (29):
1

The path of motion around a fixed axis and therefore a circular path is called:

Angular motion

2

Time rate of change of angular position of a rotating body is called:

Angular velocity

3

Time rate of change of angular velocity of a rotating body is called:

Angular acceleration

4

The point about which a body rotates is called:

Axis of rotation

5

Perpendicular distance from an axis of rotation to a line along which a force acts is called:

lever arm

6

What are two other names for lever arm?

Force arm
Moment arm

7

Product of force and lever arm is called:

torque

8

The tendency of an eccentric (off center) force to rotate an object around and axis is called:

torque

9

Torque applies to what objects?

rotating

10

Torque directly applies to what else?

Motion of the human body

11

How is torque related to the human body?

Muscles apply force to bone for us to move

12

Muscle forces are _____ and therefore we move because of torque

eccentric

13

The ______ of the muscle is where force is applied.

Insertion

14

This consists of a rigid or semi-rigid object (_____) that is capable of rotating around and axis (_____)

Lever system
(lever)
(fulcrum)

15

The force is between the effort and the load/resistance. Lever System?

Type 1 Lever
(First Class)

16

Examples of Type 1/First Class levers

See saw, claw hammer

17

The load/resistance is between the fulcrum and the effort. Lever system?

Type 2 Lever
(Second Class)

18

Examples of type two Lever systems.

Stapler, wheel barrow

19

The effort is between the fulcrum and the load/resistance. Lever system?

Type 3 Lever
(Third Class)

20

Examples of Type 3 Lever?

Fishing rod, broom, tweezers

21

If the fulcrum is in the middle of the lever, which force has advantage?

Neither force has advantage, the ratio is 1

22

Ratio of the motive of force (effort) to a given resistance force is called what?

Mechanical advantage

23

Mechanical Advantage (MA) =

Mm/Mr (motive force divided by resistance force)

24

Greater than 1 do you gain or lose mechanical advantage?

gain

25

Chiropractic adjustment mechanical advantage is less than 1 so what do we do?

Speed and stance

26

Is type 1 lever in the body common?

no

27

Example of type one lever in the body?

Neck and head

28

Example of type 2 lever in the body?

Standing on balls of feet

29

Type 3 lever in the body?

Biceps with hand lifting something.