simple biometrics Flashcards
1
Q
what is force
A
a push or a pull action applied upon an object (measured in Newtons)
2
Q
what is newtons 2nd law
A
f=ma
3
Q
how to identify classes of levers
A
FRE, 123
4
Q
what are forces
A
- gravity
- air resistance
- muscular force
- ground reaction force
5
Q
example of first class lever in body
A
head
- trapezius provide effort force
- weight of head provide resistance
- joint between spine and cranium fulcrum
6
Q
example of second class lever in body
A
standing on tip-toes
- fulcrum is joints between toes
- resistance is bodyweight
- effort provided by gastrocnemius
7
Q
advantage of second class lever
A
strength
8
Q
examples of third class levers in body
A
bicep curl
- fulcrum is elbow joint
- effort provided by bicep
- resistance is weight of dumbbell, hand, arm
footballer kicks ball
9
Q
advantage of third class lever
A
speed
