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Therapeutic Modalities II > Exam 2 - Chapter 3 Kines > Flashcards

Exam 2 - Chapter 3 Kines Flashcards

1
Q

Forces in nature can do what to motion?

A

produce, stop or modify motion

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2
Q

When force produces a push on an object

A

compression

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3
Q

When force produces a pull on an object

A

tension

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4
Q

When compression and tension are balanced, the object is said to be

A

in equilibrium

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5
Q

Force can be generated from _______ and _______ sources.

A

internal and external

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6
Q

The most common internal force is produced by

A

muscles

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7
Q

External forces include what types?

A

Fluid forces, contact forces, and gravity

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8
Q

This external force includes air and liquids

A

fluid resistance/ fluid force

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9
Q

This external force is described as a force acting in the opposite direction to the desired movement and occurring at the area of contact between the two surfaces

A

friction/ contact force

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10
Q

This external force is measured as the weight of the body though its COG

A

gravity

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11
Q

COG stands for what?

A

Center of Gravity

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12
Q

The point around which the body’s mass is evenly distributed

A

COG

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13
Q

Forms of fluid resistance include

A

buoyancy, drag and lift

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14
Q

An upward force equal to the weight of the displaced liquid

A

buoyancy

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15
Q

resistance to forward motion, of water over air

A

drag

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16
Q

change in fluid pressure as a result of differences in air or liquid flow velocities around an object

A

lift

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17
Q

Always produces rotary motion; two or more forces of equal magnitude, but opposite direction, applied to the same object but at different points of application, working together to cause movement

A

Force couple

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18
Q

center or point around which an object rotates

A

axis

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19
Q

Movement along a path pertaining to or representing a line that may be straight or curved. All parts of the object move in the same direction at the same speed

A

Linear motion

20
Q

size, amount. The pound is the basic unit of measurement in U.S. for the _________ of force

A

magnitude

21
Q

Spot on the object where the force is put. For muscular force, it is commonly considered to be at the insertion of muscle to bone.

A

Point of application

22
Q

Turning or movement about an axis; parts of the object further from the axis move at a greater speed than those close to the axis

A

rotary motion

23
Q

The turning or rotary effect of a force

A

torque

24
Q

A physical quantity or force possessing both magnitude or size and direction; can be represented by a straight line.

A

vector

25
Q

The pushing together of both sides of the joint toward the center of the joint

A

joint compression

26
Q

A pulling apart of the two joint surfaces

A

joint distraction (traction)

27
Q

What are Newton’s 3 Laws of motion?

A

Newton’s Law of Inertia, Newton’s Law of Acceleration, and Newton’s Law of Action and Reaction

28
Q

If an object is at rest, a force must act on the object to initiate movement

A

Newton’s Law of Inertia

29
Q

If an object is already in motion, it will remain in motion

A

Newton’s Law of Inertia

30
Q

This describes why an object with less mass will move faster than an object with greater mass

A

Newton’s Law of Acceleration

31
Q

This implies that there must be two forces present. Each force acts on the other, with the direction of the forces being opposite and the magnitude of the forces being equal

A

Newton’s Law of Action and Reaction

32
Q

Jumping on a trampoline is an example of which of Newton’s Laws?

A

Action and Reaction

33
Q

A flat surface or plane that is at an angle to the horizontal surface it is placed upon

A

inclined plane

34
Q
A
35
Q

a rigid bar that rotates about an axis or fulcrum; downward motion at one end causes upward motion at the opposite end

A

lever

36
Q

Also called fulcrum or pivot, the point about which the rigid bar turns

A

axis

37
Q

The effort or energy used to move or hold the object

A

force

38
Q

Also called effort arm or moment arm; distance from the axis to the point of application of the force

A

force arm

39
Q

The object one is trying to move, sometimes referred to as weight or load

A

resistance

40
Q

Distance from the axis to the point of application of the resistance or load

A

resistance arm

41
Q
A
42
Q

F_____R_____A is an example of what class of lever?

A

Second class lever

43
Q

A_____F_____R is an example of what class of lever?

A

Third class lever

44
Q

What lever is used more for strength?

A

2nd class levers

45
Q

What lever is used more for balance and equilibrium?

A

First class levers

46
Q

What lever is used more for speed and range?

A

Third class levers

Therapeutic Modalities II (19 decks)

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