Levers

Question 1

What are the different lever components?

Answer 1

Fulcrum- pivot that represents the joint
Resistance-The load that we move or lift
Effort-Agonist muscle moving the resistance

Question 2

How do you remember the different lever classes?

Answer 2

FRE

Question 3

Key points on drawing levers.

Answer 3

1st: Effort always points down on diagram-Extension,tricep
2nd: Effort arrow upwards-plantar Flexion,gastrocnemius
3rd: Effort arrow up-Flexion at bicep

Resistance is always on top and fulcrum on the bottom

Question 4

State the benefits of a long and short effort arm

Answer 4

Long-More force is applied
Short-Action can be done at speed

Note: Effort arm is always about speed and force

Question 5

State the benefits of a short and long resistance arm

Answer 5

Short-no advantage
Long-wide range of movement

Note: resistance arm is always about movement

Question 6

What is the calculation to work out the mechanical advantage?

Answer 6

Effort arm divided by the resistance arm