sac 1 part b

Question 1

biomechanics

Answer 1

biomechanics is the science that studies living things from a mechanical perspective

Question 2

quantitative analysis

Answer 2

quantitative analysis looks at numerical data

Question 3

qualitative analysis

Answer 3

qualitative analysis is a description of the quality of the performance

Question 4

force

Answer 4

a force is a defined as a push or pull. The force of gravity will pull a ball back to the ground after it has been thrown, hit, kicked. the force generated by a muscle when it contracts pull on the bone to produce movement. forces can affect objects in 2 ways:
1- changing shape of object- stretching, squashing, twisting
2- changes direction, speeds up or slows down

Question 5

formula for force

Answer 5

force= mass x acceleration

Question 6

friction force

Answer 6

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

Question 7

drag force

Answer 7

when an object or body moves through air or water. it will experience a drag force, any increase in speed results in an increase in drag

Question 8

gravitational force

Answer 8

force of attraction between two bodies or objects. on earth the gravitational force is the force that causes objects to fall downwards

Question 9

mass

Answer 9

mass is the measure of the amount of matter an object is made up of

Question 10

weight

Answer 10

weight refers to the force that is exerted on the body by gravity. weight is directly proportional to the mass of an object

Question 11

formula for weight

Answer 11

weight= mass x gravity

Question 12

inertia

Answer 12

the tendency for a body to resist a change in its state of motion whether that state is at rest or moving with a constant velocity
(speed of action)

Question 13

momentum

Answer 13

a measure of the amount of motion an object has and its resistance to changing that motion

Question 14

momentum formula

Answer 14

momentum=
mass x velocity

Question 15

conservation of momentum

Answer 15

momentum is conserved in an isolated system where there are no external forces acting.
the principle of conservation of momentum is that the total momentum of the system before the collision is equal to the total momentum after the collision

Question 16

summation of momentum

Answer 16

when the main objective of the sport is to hit, kick, or throw an object/ ball as far as possible. important the object is released with max velocity. any movement skill that involves multiple joints required summation of momentum from the beginning to the end of a movement

Question 17

impulse

Answer 17

is equal to the change in momentum of an object. impulse is equal tp the force applied multiplied by the length of time the force was applied

Question 18

impulse formula

Answer 18

impulse= force x time

Question 19

newtons 1st law of motion

Answer 19

law of inertia, this law states that a body will remain at rest or in uniform motion of a straight line unless acted upon by an external force, a ball projected into the air would still continue travelling in a straight line without gravity

Question 20

newtons 2nd law of motion

Answer 20

law of acceleration. this law allows us to calculate force and 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 21

newtons 3rd law of motion

Answer 21

law of action- reaction, when two objects come into contact with one another, they exert forces that are equal in size but opposite in direction on each other, for every action there is an equal & opposite reaction

Question 22

angular motion

Answer 22

movement of a body part around an axis of rotation

Question 23

conservation of angular momentum

Answer 23

overall angular momentum is conserved/ remains constant throughout the movement