levers

Question 1

first class lever order

Answer 1

effort down - fulcum - load/resistance

Question 2

second class lever order

Answer 2

fulcrum - load/resistance - effort up

Question 3

third class lever order

Answer 3

load/resistance - effort up - fulcrum

Question 4

way to remember levers

Answer 4

F R E

Question 5

first class lever examples in the body

Answer 5

neck - head moving forward and back (flexion + extension)
elbow - extending the arm

Question 6

first class levers sporting examples

Answer 6

• any action where triceps are the agonist
• any action where the elbow joint moves from flexion to extension

Question 7

second class lever examples in the body

Answer 7

plantarflexion in the ankle

Question 8

second class lever sporting examples

Answer 8

plantarflexion in:
- running
- kicking
- jumping
- squats

Question 9

third class lever examples in the body

Answer 9

hip & knee
- flexion + extension

dorsiflexion

Question 10

third class lever sporting example

Answer 10

• running
• jumping
• kicking
• throwing

Question 11

force arm

Answer 11

the shortest perpendicular distance between the fulcrum and effort

Question 12

resistance arm

Answer 12

the shortest perpendicular distance between the fulcrum and the distance

Question 13

mechanical advantage

Answer 13

when the force arm is longer than the resistance arm

Question 14

mechanical disadvantage

Answer 14

when the resistance arm is longer than the force arm

Question 15

does third class have a mechanical advantage or disadvantage

Answer 15

mechanical disadvantage
- muscles are unable to apply much force to move objects

Question 16

does second class have a mechanical advantage or disadvantage

Answer 16

mechanical advantage
- force arm is longer than resistance arm

Question 17

advantages of first class lever

Answer 17

larger range of movement

Question 18

disadvantages of first class lever

Answer 18

cannot apply much force