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Barbell Logic Coaching Academy > Biomechanics > Flashcards

Biomechanics Flashcards

1
Q

_____ causes change in things.

A

Force

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2
Q

Force causes what two types of change in things?

A

Deformation and motion

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3
Q

What are three types of force-induced changes?

A

Tension, compression, acceleration

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4
Q

Tension causes an object to ______.

A

Elongate

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5
Q

Compression causes an object to _____.

A

Shorten

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6
Q

Acceleration causes an object to _____.

A

Move

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7
Q

________ is a term referring to the “quantity of motion”.

A

Momentum

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8
Q

Momentum is the sum of what?

A

Mass x Velocity

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9
Q

Force can do what to momentum?

A

Change it

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10
Q

Newton’s First Law states what?

A

Objects in motion or at rest remain in that state unless worked upon by an external force.

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11
Q

Newton’s Second Law states what?

A

The change caused to motion is proportional to the amount of force applied.

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12
Q

Newton’s Third Law states what?

A

Every action has an equal and opposite reaction.

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13
Q

The Greek character Sigma (Σ) means what?

A

‘In summation’ or ‘the sum of’

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14
Q

Which of Newton’s Laws can be stated as ΣF=ma?

A

Newton’s Second law (the sum of Force is equal to mass times acceleration)

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15
Q

Which of Newton’s Laws can be stated as ΣF=0?

A

Newton’s First Law (the sum of Force is equal to 0).

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16
Q

All mass is attracted to all other mass. What is this force of attraction called?

A

Gravity

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17
Q

The force of gravity on Earth’s surface is ___m/s².

A

9.8

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18
Q

Gravity always points _____ _____.

A

Straight down

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19
Q

What is the metric unit of force?

A

The Newton

20
Q

A kilogram is a unit of ____.

A

Mass

21
Q

A pound is a unit of ____.

A

Force

22
Q

The force times the distance that the object moves in the direction force was applied is called ____.

A

Work

23
Q

Newton-meters, joules, foot-pounds and calories are all units used to represent an amount of ____.

A

Work

24
Q

Work is _____.

A

Energy

25
Q

What are two types of energy?

A

Kinetic and potential

26
Q

Energy that is stored and could be released is called _____ energy.

A

Potential

27
Q

When an object is in motion, it is said to have ______ energy.

A

Kinetic

28
Q

What are two types of potential energy?

A

Elastic and gravitational potential energy

29
Q

A loaded barbell suspended above the ground represents what type of energy?

A

Gravitational potential energy

30
Q

The so-called “stretch reflex” is an example of ______ potential energy.

A

Elastic

31
Q

The equation ½mv² (half mass times velocity squared) represents _____ energy.

A

Kinetic

32
Q

Potential energy is represented by the equation _____.

A

mgh (mass x gravity x height)

33
Q

The rate of work (force times distance) is called _____.

A

Power

34
Q

Power = ____ / _____.

A

Energy / Time

35
Q

The equation for work is ________.

A

W = F*d (Work = Force x distance)

36
Q

Power is ____ divided by time.

A

Work or force x distance

37
Q

Force, velocity and acceleration are all examples of _____.

A

Vectors

38
Q

A vector is force with ______.

A

Direction

39
Q

Something like mass or power has no direction and is called a ______.

A

Scalar

40
Q

A vector has ______ and direction.

A

Magnitude

41
Q

Examples of vectors are:

A

Velocity, Force, Acceleration, and Momentum

42
Q

Vectors can be calculated in two ways. By graphing or _______.

A

Trigonometrically

43
Q

In barbell training the force vector is _______.

A

Vertical

44
Q

Forces acting around a point of rotation are called _____.

A

Moment

45
Q

What type of motion is it when force is proportional to straight-line momentum?

A

Straight-line motion

46
Q

Force and momentum are proportional to the change in rotational momentum in ______ motion.

A

Rotational

47
Q

F=ma is the equation for ____________ motion.

A

Straight-line

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