Biomechanics/Applied Kinesiology

Question 0

lever

Answer 0

a rigid bar with a fixed point around which it can rotate when an external force is applied

Question 1

Linear momentum

Answer 1

the force with which a body moves; equal to its mass times velocity

Question 2

fulcrum

Answer 2

the fixed point of a lever

Question 3

axis of rotation

Answer 3

the imaginary line or point about which a lever rotates; the axis of rotation is perpendicular to the plane of movement

Question 4

lever arm

Answer 4

the perpendicular distance from the axis of rotation to the line of the force

Question 5

force arm (Fa)

Answer 5

the lever arm length of the motive force

Question 6

Resistance arm (Ra)

Answer 6

the lever arm length of the resistance

Question 7

the lever is in balance if:

Answer 7

the force times the force arm is equal to the resistance times the resistance arm

Question 8

torque

Answer 8

the turning effect of a force operating on a lever at some distance from the axis of rotation

Question 9

how is the amount of torque found?

Answer 9

by multiplying the amount of force by the length of the lever arm

Question 10

the body consists of which type of lever?

Answer 10

third class levers

Question 11

what is a third class lever?

Answer 11

one in which the force (F) acts between the axis (X) and the resistance (R)

Question 12

are most muscles in the human body longitudinal or penniform?

Answer 12

penniform

Question 13

what is a penniform muscle?

Answer 13

one in which the muscle fibres lie diagonal to the line of pull.

Question 14

static (isometric) contraction

Answer 14

when resistance is greater than or equal to the tension in a muscle and no visible movement occurs

Question 15

concentric (shortening) contraction

Answer 15

when the force generated by a muscle is greater than an applied resistance

Question 16

eccentric (lengthening) contraction

Answer 16

occurs when an external force exceeds the contractile force generated by a muscle.

Question 17

sagittal plane

Answer 17

the plane created by bisecting the body along its line of bilateral symmetry

Question 18

frontal (coronal) plane

Answer 18

A coronal plane (also known as the frontal plane) is any vertical plane that divides the body into ventral and dorsal (belly and back) sections.

Question 19

transverse plane

Answer 19

The transverse plane (also called the horizontal plane, axial plane, or transaxial plane) is an imaginary plane that divides the body into superior and inferior parts. It is perpendicular to the coronal and sagittal planes

Question 20

glenohumeral joint

Answer 20

shoulder joint

Question 21

what kind of joint is the glenohuneral joint?

Answer 21

multiaxial; it comprises the articulation between the glenoid fossa of the scapula and the humerus