B2.1 - B2.3

Question 1

Difference between displacement and distance

Answer 1

distance is the total length covered, and displacement is the change in position from the starting point to the ending point. Distance is a vector so it has direction distance doesn’t.

Question 2

newtons second law

Answer 2

force = ma

Question 3

How can a gymnast increase momentum in a somersault

Answer 3

Putting a lot of force into the ground in order to propel upwards and tucking fast to decrease inertia and increase rotational velocity.

Question 4

How can you increase stablity

Answer 4

wide base of support, lower center of gravity, the weight of an object affects stability, line of gravity through base of support.

Question 5

ex of maximizing friction for better performance

Answer 5

in track and field Runners rely on friction between their shoes and the track to prevent slipping and to propel themselves forward. Spikes on the bottom of running shoes are designed to increase friction, giving runners better grip and more efficient transfer of force

Question 6

What are the forces acting on a body as it moves through a fluid?

Answer 6

Drag and lift

Question 7

what is lift

Answer 7

a perpendicular force that can occur if there’s an angle or shape that creates pressure differences.

Question 8

What are the directions of the drag and the lift force?

Answer 8

Drag always acts opposite to the direction of motion. Lift acts perpendicular to the direction of motion (often upward)

Question 9

Explain how frontal area/surface area affect the drag force on an object moving through the air

Answer 9

larger surface area/frontal area the more drag

Question 10

Explain how shape affect the drag force on an object moving through the air

Answer 10

larger the shape the more drag

Question 11

Explain how the velocity affect the drag force on an object moving through the air

Answer 11

Higher velocity increases drag

Question 12

Explain how air density affect the drag force on an object moving through the air

Answer 12

higher air density more drag

Question 13

What is newtons first law

Answer 13

Law of inertia an object will stay at rest unless acted upon ex. soccer ball

Question 14

Newtons third law

Answer 14

Every force/action has an equal and opposite reaction ex. gymnast pushing into the floor for a front tuck

Question 15

Describe the boundary layer

Answer 15

A very thin layer of air or fluid that sticks to the surface of an object moving through it. This thin layer is important because it affects how much resistance or drag the object experiences.

Question 16

What are the phases of a movement

Answer 16

Preparatory
Force production
Critical instant
Follow through / recovery

Question 17

Is equipment required to complete movement analysis?

Answer 17

You can observe movement without equipment but they also use cameras sensors timers, and motion captures for deeper analysis.

Question 18

Analyze the phases of a running gait cycle

Answer 18

Stance phase: When the foot is in contact with the ground, divided into heel strike, mid-stance, and toe-off.
Swing phase: When the foot is off the ground, swinging forward to prepare for the next step.

Question 19

Linear

Answer 19

in a straight line ex. ice hockey puck sliding over ice, or skiing

Question 20

curvilinear

Answer 20

in a curve, like a shot put traveling through the air

Question 21

angular

Answer 21

rotation around an axis ex.gymnast rotating around the high bar

Question 22

General

Answer 22

Linear and angular motion together ex. ice skating, biking, running

Question 23

what is speed

Answer 23

scalar

Question 24

what is mass

Answer 24

scalar

Question 25

What is density

Answer 25

scalar

Question 26

What is volume

Answer 26

scalar

Question 27

What is time

Answer 27

scalar

Question 28

What is temprature

Answer 28

scalar

Question 29

What is velocity

Answer 29

Vector

Question 30

What is force

Answer 30

Vector

Question 31

What is acceleration

Answer 31

Vector

Question 32

What is gravity

Answer 32

Vector

Question 33

What is drag

Answer 33

Vector

Question 34

What is impulse

Answer 34

Vecotr

Question 35

What is momentum

Answer 35

Vector

Question 36

what is the relationship between impulse and momentum

Answer 36

greater the impulse = greater change in momentum

Question 37

relashionship between impulse and time

Answer 37

increasing the time over which a force is applied to an object results in a greater change in momentum or impulse.

Question 38

When a skater is spinning and puts there arms out there inertia is... and angular velocity is...

Answer 38

inertia is getting higher angular velocity is getting lower, when they bring there arms in inertia decreases velocity increases

Question 39

Projectile motion

Answer 39

motion of an object that has been dropped or projected into the air and the only forces acting upon that object are gravity and air resistance.

Question 40

Is air resistance horizontal or verticle?

Answer 40

Its horizontal and constant

Question 41

Is gravity horizontal or vertical

Answer 41

Vertical

Question 42

What the three things does the pathway of a projectile depend on

Answer 42

Initial conditions of projection (height, angle and speed) Gravity Air Resistance

Question 43

what do initial conditions of projection include

Answer 43

Height of release Angle of release Velocity of release

Question 44

How does increase in speed of release affect range

Answer 44

even a small increase in speed of release will translate to a large increase of range

Question 45

If the landing height is lower than the projection height what is the optimal angle

Answer 45

angle lower than 45

Question 46

When the landing height is equal to the projection height what is the optimal angle

Answer 46

45 degrees

Question 47

If the landing height is higher than the projection height what is the optimal angle

Answer 47

Higher than 45 degrees

Question 48

Relationship between height of release and range

Answer 48

The higher the height of release, the longer the range

Question 49

What is the center of mass

Answer 49

The COM is the point around which the mass of a body is evenly distributed

Question 50

Relationship between air resistance and fast moving objects

Answer 50

higher air resistance if the object is moving fast slow objects have low air resistance

Question 51

Relationship between slow objects and gravity

Answer 51

In slow moving objects, gravity affects the flight path more than air resistance

Question 52

relationship between fast objects and air resistance

Answer 52

Is fast moving objects, air resistance exerts more force on the flight path and the object will experience greater deceleration

Question 53

relationship between weight and air resistance

Answer 53

the heavier something is, the less air resistance will affect it The lighter an object is, the more air resistance will affect it

Question 54

Discrete skills

Answer 54

have a clear start and end

Question 55

Continuous skills

Answer 55

just keeps going like swimming running cycling

Question 56

Phases of a continuous skill

Answer 56

Entry Phase - begins when the hand enters the water Pull Phase - begins when the hand starts pulling backwards Push Phase - begins when the hand is vertical aligned with the shoulder (i.e. pointing to the bottom of the pool) Recovery - begins when the hand exits the water

Question 57

What are some benefits of movement analysis for health and health care professionals

Answer 57

helps to identify flaws that could lead to injury and fix them to prevent injury, health care professionals can create injury prevention programs, corrective exercises, and rehab protocols,

Question 58

What are some benefits of movement analysis for performance

Answer 58

Coaches can look at their teams identify their athletes' flaws and weaknesses, make proper training interventions to improve technique, assess progress, navigates players returning to play from injury, can help track athletes' workloads.