1.3 Biomechanics (Stability and Lever Systems)

Question 1

Stability

Answer 1

The ability of a body to resist motion and remain at rest, or for a body to withstand a force applied and return to its original position without damage

Question 2

First class lever

Answer 2

Fulcrum in the middle, Extension of the neck when preparing to head a football

Question 3

Second class lever

Answer 3

Lever in the middle, Ball of the foot in the take-off phase of a high jump

Question 4

Third class lever

Answer 4

Effort in the middle, Flexion of the elbow during a bicep curl

Question 5

Mechanical advantage

Answer 5

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

Question 6

Mechanical disadvantage

Answer 6

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

Question 7

Lever

Answer 7

Bone

Question 8

Fulcrum

Answer 8

Joint

Question 9

Effort

Answer 9

Muscular force

Question 10

Load

Answer 10

Weigh or Resistance