SB- Test 1 answers

Question 1

• The branch of mechanics that deals with the geometry of the motion of objects, including displacement, velocity, and acceleration, without taking into account the forces that produce the motion, best defines the field of ______

Answer 1

Kinematics

Question 2

• The application of mechanical laws to living structures, specifically to the locomotor system of the human body, best defines the field of ____

Answer 2

biomechanics

Question 3

• When the Center of Mass (CoM) of an object and its Line of Gravity (LoG) fall outside of its Base of Supplort (BoS), the object will _____

Answer 3

fall over

Question 4

• The CoM of the average human body standing in anatomical position is located just anterior to the _____

Answer 4

sacral base

Question 5

• Lowering the Center of Mass of an object increases its ___

Answer 5

stability

Question 6

• Least common lever system found in the body?

Answer 6

Lever 1

supraspinatus

Question 7

• Which of the one of the folling muscles functions as an example of the least common lever system found in the human body?

Answer 7

supraspinatus

lever 1

Question 8

• All points of an object moving the same distance, at the same time, and in parallel paths is indicative of _____ motion

Answer 8

translational

Question 9

• Any “Anatomic pully” acts to increase the __ of a muscle

Answer 9

moment arm

Question 10

• When the forces applied to an object has action lines that lie at angles to each other it is refered to as _____ force system

Answer 10

concurrent

they make resultant forces

Question 11

• Most movement in the human body is a combination of the two types of motion that involves an instantaneous center (or axis) of rotation and is reffed to as ____ motion

Answer 11

General

Question 12

• In a third class lever system, the muscle acts as the ______ and produces __ contraction

Answer 12

effort force/ concentric

Question 13

• In a second class lever system, the muscle acts as the ___ and produces ____ contraction

Answer 13

resistance force/ eccentric

Question 14

During muscle contraction, when the Effort * Force is equal to the resistance force, and no net torque is produced, it is referred to as a _____ contraction

Answer 14

isometric

Question 15

• When a muscle contracts the force of pull produced is always towards the _____ of the muscle

Answer 15

center

Question 16

• bones or bony prominences that alter the direction of pull of a muscle are known as ____

Answer 16

anatomic pulleys

Question 17

• A chiropractic line of drive is described using its individual component vectors (I/S A/P) but is applied using the ___ vector

Answer 17

resultant

Question 18

• If the center of mass of an out stretched arm is located just proximal to the elbow, gripping a baseball will move the CoM ___

Answer 18

toward the hand

Question 19

• The most common force system found in the body is the ____ force system

Answer 19

concurrent

Question 20

• Whether or not a body changes position, including how its arms and legs are positioned, the center of mass always _____

Answer 20

shifts accordingly

Question 21

• Mass equals weight _____

a) earth
b. ) on the moon
c. ) outer space
d. ) under water

Answer 21

earth

Question 22

• The theoretical point around which a body’s mass is equally distributed is called the _____

Answer 22

center of mass

Question 23

• The least common lever system found in the body is the ____ Class lever system

Answer 23

1st

Question 24

• The pull of one bony segment away from another is an example of ______ forces

Answer 24

distraction forces

Question 25

• forces that create opposite pulls on a single object are known as _____ forces

Answer 25

tensile

Question 26

*Forces that are parallel to contacting surfaces, attempting to move in one object on another object, are known as ___ forces

Answer 26

shear

Question 27

• Two forces that cause joint reaction forces to occur are known as _____ forces

Answer 27

compression forces

Question 28

*Forces that resist parallel forces attempting to move one object on another are known as ____ forces

Answer 28

friction

Question 29

*The strenght of rotation produced by a force couple is known as ___

Answer 29

torque

Question 30

• When a muscle lengthens during contraction it is undergoing ___ contraction

Answer 30

eccentric

Question 31

• When a muscle shortens during contraction it is undergoing _____ contraction

Answer 31

concentric

Question 32

When a muscles length doesnt change during contraction it is performing _____ contraction

Answer 32

isometric

Question 33

“An object will remain at rest or in a uniform motion unless acted on by an unbalanced force,” states Newton’s first law, the law of ______

Answer 33

inertia

Question 34

• The rate at which the speed of an object increases is proportional to the net forces acting on it and inversely proportional to its mass,” state newtons second law, the law of ______

Answer 34

acceleration

Question 35

“For every action there is an equal and opposite reaction” states Newtons third law, the law of ___

Answer 35

reaction

Question 36

• Rotation of the trunk of the body occurs around the _____ axis and in the ___ plane

Answer 36

Y axis

transverse plane

Question 37

Flexion and extension of the trunk of the body occurs around the _____ axis and in the ___ plane

Answer 37

x axis

sagittal plane

Question 38

Lateral bending of the trunk of the body occurs around the ___ axis and in the ___ plane

Answer 38

z axis

coronal plane

Question 39

Force = _____ x ____

Answer 39

mass x velocity