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PE A2 - physiology > Biomechanics > Flashcards

Biomechanics Flashcards

1
Q

What is a scalar

A

To do with the size and force

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2
Q

What are the 3 principles of muscles movements

A
  1. Muscles create a force
  2. The force is applied
  3. Force governs direction
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3
Q

How to calculate Wight force ( what is the unit for 👆 )

A

newtons

Mass (kg) X acceleration ( N )

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4
Q

What is inertia

A

Reluctance of a body to change its stage of motion

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5
Q

What is displacement

A

The shortest route possible between a start and finish

Vector

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6
Q

What is distance

A

Measures of a path a body takes from moving from 1 position to another

( scalar )

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7
Q

What is acceleration

A

The rate of change of velocity of an object ( vector )

Positive change in velocity

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8
Q

What is momentum and

How to calculate momentum

(kg/m/s )

A

Amount of motion a moving body possess and this is the the result of mass and velocity

MAss X velocity

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9
Q

What is impulse (N/s)

And how to work it out

A

Length of time a force is applied to an object or body

Force (N) X time (sec)

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10
Q

What is a vector

A

To do with the direction and magnitude

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11
Q

how do you calculate velocity

A

displacement/time

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12
Q

how do you calculate speed

A

distance/time

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13
Q

is displacement a vector or scalar

A

vector

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14
Q

is distance a vector or sclar

A

scalar

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15
Q

what are the 3 laws of motion

A

1, inertia
2, acceleration
3, action reaction

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16
Q

3 factors that affect an object in motion

A

angle of release
height of release
velocity of release

17
Q

what 2 forces affect a projectile (in air)

A

weight and air resistance

18
Q

why is a force a vector quantity

A

it has a size, direction and point of application

19
Q

name the vertical forces

A

weight
gravity
reaction

20
Q

name the horizontal forces

A

friction

air resistance

21
Q

what does angular momentum relate to

A

rotation of an object in motion

is inversely proportional

22
Q

what does angular momentum relate to

A

moment of inertia

angular velocity

23
Q

what is moment of inertia

what does it depend on :

A

the resistance of the body that is in angular motion

body mass
distribution of mass

PE A2 - physiology (5 decks)

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