Lecture 2 Flashcards

1
Q

What is newtons first law?

A

An object will stay at rest unless a force acts upon it

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2
Q

Newtons second law

A

F=ma

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3
Q

What is the force equation

A

Force=mass x acceleration

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4
Q

What is work?

A

Mechanical energy required to move

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5
Q

What is the work equation?

A

Work= force x distance

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6
Q

What is power?

A

The amount of work over a given amount of time

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7
Q

What is the power equation?

A

Power = work/time

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8
Q

What is efficiency?

A

A measure of how much energy actually goes into the movement

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9
Q

What is the efficiency equation?

A

Efficiency = energy in/energy out

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10
Q

How do muscles work?

A

by shortening

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11
Q

What is striated muscle?

A

A muscle made of sarcromeres with a striped appearance

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12
Q

What is myosin?

A

A protein known for its role in muscle contraction with two heads and a long tail

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13
Q

Where is myosin found?

A

Myosin creates thick filament

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14
Q

What forms thin filament?

A

Actin and tropomyosin

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15
Q

What is a fascicle?

A

A bundle of muscle fibres

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16
Q

What is a pennation angle?

A

Pennation angle is the angle between the longitudinal axis of the entire muscle and its fibers

17
Q

What is moment arms?

A

The moment is a force that produces a turning motion,increasing this creates larger movements

18
Q

Where do muscles usually act?

A

On hard tissues eg bones

19
Q

What is stress?

A

Force,normalised to the area it acts on

20
Q

What is strain?

A

Deformation,normalised

21
Q

What is compression?

A

Pressure from both ends

22
Q

What is tension?

A

Pulling

23
Q

What is torsion?

A

twisting

24
Q

What is bending?

A

pressure from the middle

25
Q

What are safety factors?

A

Ratio of the structures strength to maximum stress it is likely to encounter

26
Q

When does stress increase?

A

With size