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Biomechanics > Quiz #1 > Flashcards

Quiz #1 Flashcards

(31 cards)

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1
Q

Scalar

A

Contains magnitude (+/-)

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2
Q

Examples of Scalar

A

Mass
Distance
Speed
Volume

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3
Q

Vector

A

Contains magnitude and direction

Represented by arrows

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4
Q

Examples of Vector

A

Velocity
Force
Acceleration

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5
Q

Force

A

A vector that tells you strength and direction of a push or pull

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6
Q

What is Force measured in?

A

Newtons (N) or kg(m/s^2)

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7
Q

Force Equation

A

F= mass x acceleration

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8
Q

Internal Force

A

Force that acts within an object or system

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9
Q

External Force

A

Force that acts on an object as a result of interaction with environment

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10
Q

Types of Internal Forces:

A

Compressive
Tensile
Shear

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11
Q

Examples of External Forces:

A

Friction
Weight
Contact

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12
Q

Examples of Compressive Forces:

A

Push ups

Barbell on shoulders

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13
Q

Examples of Tensile Forces:

A

Stretching
Hanging from a bar
Ankle sprain/strain
Cervical traction

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14
Q

Example of Shear Forces:

A

ACL tear

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15
Q

Weight

A

Force of gravity acting on an object

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16
Q

Weight Equation

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A

W= mass x gravity

17
Q

Contact Force

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A

Forces that occur between objects (solid or fluid) in contact with each other

18
Q

Examples of Contact Force:

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A 
Friction
Normal contact
Ground reaction force
Fluid resistance
Joint reaction force
19
Q

Examples of Non-contact Force:

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A

Gravitational force
Electrical force
Magnetic force

20
Q

Normal Contact Force

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A

Perpendicular component force

Acts perpendicular to the surfaces in contact

21
Q

Friction Force

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A 
Parallel component
Opposes motion (sliding) between objects
22
Q

Ground Reaction Force

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A

Combination of friction force and normal contact force

23
Q

2 Types of Frictional Force:

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A

Static (limiting)

Dynamic (sliding/kinetic)

24
Q

Static Frictional Force

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A

Two surfaces not moving relative to each other

25
Dynamic Frictional Force
Two surfaces moving or sliding relative to each other
26
T/F: Dry friction (two solid surfaces in contact) is NOT affected by the size of the surface area in contact.
True
27
Resultant Forces
Addition of 2 or more force vectors
28
Net Forces
Sum of all forces acting on an object
29
Colinear Forces
Same line of action | Could be same or opposite directions
30
Concurrent Forces
Different line of action, BUT act through the same point
31
Static Equilibrium
State or condition of an object when it is not moving

Biomechanics (6 decks)

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