levers

Question 1

what is a lever system?

Answer 1

are the co ordination of our bones and muscles to create human movement

Question 2

what is the function of a lever system ?

Answer 2

1. to generate muscular effort to overcome a given load

2. increase speed of a given movement

Question 3

where are the lever systems components located

Answer 3

lever: bone
fulcrum : joint
effort: muscular force
load : weight and resistance

Question 4

first class lever system

Answer 4

E - F - L

e.g extension of the neck when preparing to head a football

Question 5

second class lever system

Answer 5

F - L - F

e.g ball of the boot in the take off phase of a high jump

Question 6

third class lever system

Answer 6

F - E - L

e.g flexion of the elbow during bicep curl

Question 7

what is a mechanical advantage of the lever system?

Answer 7

second class lever systems where the effort arm is greater than the load arm. a large load arm can be moved with a relatively small effort

Question 8

what is a mechanical disadvantage of the lever system ?

Answer 8

third class lever systems where the load arm is greater than the effort arm. a large effort it required to move a relatively small load.