Exam 1

Question 1

Torque

Answer 1

torque=force*length of moment arm

think “the tendency of a force to rotate the body to which it is applied” measure in newton-meter or Nm

Question 2

First - class lever

Answer 2

Muscle force (Mm or Maf and the resistive force (Mr or Mrf) are on opposite sides of the fulcrum

Question 3

Second - class lever

Answer 3

Muscle force (Mm or Maf) and resistive force (Mr or Mrf) are on the same side of the fulcrum and Maf >Mrf

Question 4

Function of the patella

Answer 4

lengthens the moment on the applied force

Question 5

Fa

Answer 5

applied force

Question 6

Fr

Answer 6

resistance force

Question 7

Maf

Answer 7

(units used in length - meters) moment arm of applied force

Question 8

Mrf

Answer 8

(units used is length) moment arm of resistance force

Question 9

Mechanical advantage

Answer 9

Maf / Mrf

think “advantage gained by using a lever”

Question 10

Third - class lever

Answer 10

muscle force (Mm or Maf) and resistive force (Mr or Mrf) are on the same side of the fulcrum 
Maf < Mrf

Question 11

MA = 1

Answer 11

lever alters movement direction but does nothing to magnify either the effort or resistance force

Question 12

MA > 1

Answer 12

torque is magnified by the effort force

Question 13

MA < 1

Answer 13

a much greater force is required to overcome the resistance force

Question 14

velocity

Answer 14

rapid force output = velocity

Question 15

agonist, antagonist, synergist

Answer 15

agonist - prime mover
antagonist - working against the agonist
synergist - assisting the agonist

Question 16

hypertrophy

Answer 16

will not start right away it takes about 6-8 weeks