u3 aos1 part 2

Question 1

biomechanics

Answer 1

the study of the mechanical principles that govern human movement

Question 2

kinetics

Answer 2

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

Question 3

kinematics

Answer 3

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

Question 4

motion

Answer 4

the change in position of a body in relation to time

Question 5

linear motion

Answer 5

motion that occurs either in a straight line or curved path

Question 6

angular motion

Answer 6

movement around a central axis of rotation

Question 7

mass

Answer 7

the quantity of matter found within a particular body

Question 8

inertia

Answer 8

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

Question 9

velocity

Answer 9

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

Question 10

force

Answer 10

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

Question 11

momentum

Answer 11

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

Question 12

force summation

Answer 12

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

Question 13

simultaneous force summation

Answer 13

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

Question 14

sequential force summation

Answer 14

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

Question 15

moment of inertia

Answer 15

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

Question 16

newton’s first law of motion

Answer 16

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

Question 17

newton’s second law of motion

Answer 17

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

Question 18

newton’s third law of motion

Answer 18

for every action, there is an equal and opposite reaction

Question 19

impulse

Answer 19

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

Question 20

displacement

Answer 20

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

Question 21

speed

Answer 21

the rate of motion (distance/time)

Question 22

general motion

Answer 22

combination. movement around an axis that causes straight line movement

Question 23

acceleration

Answer 23

rate of velocity change experienced by an object over time

Question 24

distance

Answer 24

how much ground an object covers throughout its motion

Question 25

projectile motion

Answer 25

an object or body released into the air

Question 26

speed of release

Answer 26

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

Question 27

angle of release

Answer 27

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

Question 28

height of release

Answer 28

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

Question 28

equilibrium

Answer 28

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

Question 29

centre of gravity

Answer 29

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

Question 29

line of gravity

Answer 29

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

Question 30

base of support

Answer 30

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

Question 31

friction

Answer 31

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

Question 32

first class lever

Answer 32

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

Question 33

second class lever

Answer 33

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

Question 34

third class lever

Answer 34

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

Question 35

lever

Answer 35

a rigid structure that rotates around an axis

Question 36

angular momentum

Answer 36

the amount of angular motion possessed by a body

Question 37

newton's first law of angular motion

Answer 37

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

Question 38

newton's second law of angular motion

Answer 38

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

Question 39

newton's third law of angular motion

Answer 39

for every torque there is an equal and opposite torque

Question 40

torque

Answer 40

the turning effect caused by applying an eccentric force