Kinetic Concepts (Chapter 3)

Question 1

Biomechanics

Answer 1

the study of living things from a mechanical perspective

Question 2

Qualitative analysis

Answer 2

numerical data

Question 3

Quantitative analysis

Answer 3

description of the quality of the performance

Question 4

Measurement tools

Answer 4

• video recording
• optoelectronic motion analysis
• goniometry (measurement of joint angles)
• electromyography (electrical activity in muscle prior to contraction)
• apps

Question 5

Force

Answer 5

push or pulling movement

Question 6

Force equation

Answer 6

force = mass x acceleration

Question 7

Friction

Answer 7

occurs when two surfaces come into contact with each other, opposes motion of object

Question 8

Air and water resistance

Answer 8

when body moving through air or water, it will experience a drag force

Question 9

Gravitational force

Answer 9

attraction between two bodies

Question 10

Weight

Answer 10

the force exerted on the body by gravity

Question 11

Mass

Answer 11

the amount of matter an object is made up of

Question 12

Inertia

Answer 12

tendency of a body to resist a change in its state of motion

Question 13

Momentum

Answer 13

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

Question 14

Momentum equation

Answer 14

momentum = mass x velocity

Question 15

Conservation of momentum

Answer 15

total momentum of the system before the collision is equal to the total momentum after the collision

Question 16

Summation of momentum

Answer 16

coordinating all body segments in a sequential manner

Question 17

Impulse

Answer 17

the change in momentum of an object

Question 18

Impulse equation

Answer 18

impulse = force x time

Question 19

Newton’s first law

Answer 19

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

Question 20

Newton’s second law

Answer 20

a force applied to an object will produce a change in motion in the direction of the applied force and is directly proportional to the size of the force

Question 21

Newton’s third law

Answer 21

for every action there is an equal and opposite reaction

Question 22

Newton’s first law of angular motion

Answer 22

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

Question 23

Newton’s second law of angular motion

Answer 23

a torque applied to an object will produce a change in its 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 24

Newton’s third law of angular motion

Answer 24

for every torque there is an equal and opposite torque

Question 25

Moment of inertia

Answer 25

its tendency to resist change in its rotary motion

Question 26

Moment of inertia equation

Answer 26

moment of inertia - mass x radius ^2

Question 27

Conservation of angular momentum

Answer 27

total angular momentum before collision is equal to after