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Biomechanics > Quiz #1 > Flashcards

Quiz #1 Flashcards

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

A

W= mass x gravity

17
Q

Contact Force

A

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

18
Q

Examples of Contact Force:

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

Examples of Non-contact Force:

A

Gravitational force
Electrical force
Magnetic force

20
Q

Normal Contact Force

A

Perpendicular component force

Acts perpendicular to the surfaces in contact

21
Q

Friction Force

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

Ground Reaction Force

A

Combination of friction force and normal contact force

23
Q

2 Types of Frictional Force:

A

Static (limiting)

Dynamic (sliding/kinetic)

24
Q

Static Frictional Force

A

Two surfaces not moving relative to each other

25
Q

Dynamic Frictional Force

A

Two surfaces moving or sliding relative to each other

26
Q

T/F:

Dry friction (two solid surfaces in contact) is NOT affected by the size of the surface area in contact.

A

True

27
Q

Resultant Forces

A

Addition of 2 or more force vectors

28
Q

Net Forces

A

Sum of all forces acting on an object

29
Q

Colinear Forces

A

Same line of action

Could be same or opposite directions

30
Q

Concurrent Forces

A

Different line of action, BUT act through the same point

31
Q

Static Equilibrium

A

State or condition of an object when it is not moving

Biomechanics (6 decks)

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