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3/4 pe > u3 aos1 part 2 > Flashcards

u3 aos1 part 2 Flashcards

1
Q

biomechanics

A

the study of the mechanical principles that govern human movement

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2
Q

kinetics

A

the study of forces that cause motion and also the forces resulting from motion

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3
Q

kinematics

A

the study of movement with reference to time, displacement, and velocity

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4
Q

motion

A

the change in position of a body in relation to time

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5
Q

linear motion

A

motion that occurs either in a straight line or curved path

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6
Q

angular motion

A

movement around a central axis of rotation

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7
Q

mass

A

the quantity of matter found within a particular body

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8
Q

inertia

A

the resistance of a body to a change in its state of motion

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9
Q

velocity

A

the rate of the speed an object moves its position. displacement/time

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10
Q

force

A

a push or pull. It will change the shape of the object or move the object. mass x acceleration

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11
Q

momentum

A

a measure of the amount of motion an object has and its resistance to changing that motion. mass x velocity

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12
Q

force summation

A

the correct timing and sequencing of body segments and muscles through a range of motion

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13
Q

simultaneous force summation

A

the use of multiple body parts at the same time to produce movement

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14
Q

sequential force summation

A

the activation of body parts that are used in sequence to produce force

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15
Q

moment of inertia

A

a measure of an object’s resistance to change in its rate of rotation

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16
Q

newton’s first law of motion

A

a body will remain at rest or in uniform motion in a straight line unless acted upon by an external force

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17
Q

newton’s second law of motion

A

a force applied to an object will produce a change in motion (acceleration) in the direction of the applied force that is directly proportional to the size of force

18
Q

newton’s third law of motion

A

for every action, there is an equal and opposite reaction

19
Q

impulse

A

change in momentum of an object and it is proportional to the length of time the force is applied. force x time

20
Q

displacement

A

the difference between the initial position and final position of an object

21
Q

speed

A

the rate of motion (distance/time)

22
Q

general motion

A

combination. movement around an axis that causes straight line movement

23
Q

acceleration

A

rate of velocity change experienced by an object over time

24
Q

distance

A

how much ground an object covers throughout its motion

25
Q

projectile motion

A

an object or body released into the air

26
Q

speed of release

A

the force applied to the projectile will have a large impact on its motion

27
Q

angle of release

A

there needs to be an optimal angle of release to minimise the effects of both gravity and air resistance

28
Q

height of release

A

if the angle and speed of release are constant, an object released from a higher point will travel further than one released from a lower level

28
Q

equilibrium

A

a state in which there is a balance of forces or influences in opposition to each other

29
Q

centre of gravity

A

the central point of an object, about which all of its weight is evenly distributed and balanced

29
Q

line of gravity

A

an imaginary line which passes through the centre of gravity and continues down into the centre of an object’s base of support

30
Q

base of support

A

the area of an object that is in contact with the surface supporting it

31
Q

friction

A

occurs when two surfaces come in contact with each other. opposes the motion of an object

32
Q

first class lever

A

the axis as the central component that separates the force and resistance

33
Q

second class lever

A

the resistance as the central component that separates the force and axis

34
Q

third class lever

A

the force as the central component that separates the resistance and axis

35
Q

lever

A

a rigid structure that rotates around an axis

36
Q

angular momentum

A

the amount of angular motion possessed by a body

37
Q

newton’s first law of angular motion

A

the angular momentum of a body remains constant unless acted upon by an external torque

38
Q

newton’s second law of angular motion

A

a torque applied to an object will produce a change in angular motion in the direction of the applied torque that is directly proportional to the size of the torque and inversely proportional to the moment of inertia of the object

39
Q

newton’s third law of angular motion

A

for every torque there is an equal and opposite torque

40
Q

torque

A

the turning effect caused by applying an eccentric force

3/4 pe (6 decks)

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