biomechanics

Question 1

biomechanics

Answer 1

biomechanics refers to the study of the mechanical principles that govern human movement.

Question 2

kinetics

Answer 2

kinetics refers to the study of forces that cause motion.

Question 3

kinematics

Answer 3

kinematics refers to the description of motion.

Question 4

linear motion

Answer 4

linear motion refers to the motion that occurs in a straight line or a curved path such as a sprint.

Question 5

angular motion

Answer 5

angular motion refers to motion that takes palce when a body moves around an axis in a circular path such as a figure skating turn.

Question 6

general motion

Answer 6

general motion refers to a combination of linear and angular motion and makes up the majority of movements.

Question 7

projectile motion

Answer 7

projectile motion refers to a body or object leaving the ground.

Question 8

mass

Answer 8

mass refers to the quantity of matter in a body.

Question 9

inertia

Answer 9

inetia refers to the resistance of a body to change its state of motion.

Question 10

force

Answer 10

force refers to the push or pull acting on an object.

Question 11

momentum

Answer 11

momentum refers to mass in motion which is the product of mass and velocity.

Question 12

impulse

Answer 12

impulse refers to the change in momentum of an object which is the product of force and time.

Question 13

weight

Answer 13

weight refers to the force that is exerted on the body by gravity.

Question 14

force

Answer 14

force causes objects to change shape, speed or direction which is the product of mass and accleration.

Question 15

normal force

Answer 15

normal force refers to the support force exerted by one stable object on another person such as leaning on a wall.

Question 16

applied force

Answer 16

applied force refers to a force applied to an object by another person or another subject such as a cricket bat.

Question 17

gravity / gravitational force

Answer 17

gravity or gravitational force refers to the force of attraction between two objects.

Question 18

drag / drag force

Answer 18

drag or drag force refers to a frictional force that occurs when one of the surfaces is air or water.

Question 19

friction

Answer 19

friction refers to two surfaces making contact with each other.

Question 20

generating / reducing momentum

Answer 20

generating momentum means that impulse needs to be maximised by increasing force and/ or decreasing time.

reducing momentum means that impulse needs to be applied without inflicting pain or damage which can be done by increasing time taken to complete the skill.

Question 21

static

Answer 21

static refers to something that is stationary.

Question 22

dynamic

Answer 22

dynamic refers to something that is moving.

Question 23

conservation of momentum

Answer 23

total momentum before collision = total momentum after collision

Question 24

sequential summation of momentum

Answer 24

sequential summation of momentum results in maximal force production

Question 25

newtons first law

Answer 25

law of inertia:
a body will remain at rest or uniform motion unless acted upon by an external force.

Question 26

newtons second law

Answer 26

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

Question 27

newtons third law

Answer 27

law of action-reaction:
for every action there is an equal and opposite reaction.

Question 28

torque

Answer 28

torque refers to an eccentric force that causes an object to rotate which is the product of force and lever arm.

Question 29

angular momentum

Answer 29

angular momentum refers to the amount of angular momentum processed by a body which is the product of angular velocity and moment of inertia.

Question 30

conservation of angular momentum

Answer 30

• decreasing the radius of the rotation (tuck) increases angular velocity, moi decreases too
  -increasing the radius of rotation (pike) decreases angular velocity, moi increases

Question 31

distance

Answer 31

distance refers to how much ground an object covers throughout its motion.

Question 32

displacement

Answer 32

displacement refers to an object’s overall change of position from one point in time to another.

Question 33

angular distance

Answer 33

angular distance refers to the toal distance of all angular changes that result from an object or body part angle between the starting and finishing position.

Question 34

angular displacement

Answer 34

angular displacement refers tot he difference in degrees between the object or bodu part’s initial and final position.
- clockwise = positive
- anticlockwise = negative

Question 35

speed

Answer 35

speed refers to the time taken to cover a certain distance.
speed = distance / time

Question 36

velocity

Answer 36

velocity refers to the time taken to change position.
velocity = displacement / time

Question 37

acceleration

Answer 37

acceleration refers to the change in velocity over a period of time.
- positive = speeding up
- negative = slowing down
- zero = constant velocity

Question 38

projectile

Answer 38

a projectile refers to an object or body that travels through the air.

Question 39

factors affecting projectile motion

Answer 39

• angle of release
• height of release
• speed of release