Biomechanics - Bewtons laws of motions Flashcards
What are Newton’s laws of motion
Law of inertia
Law of acceleration
Law of reaction
What is inertia
The resistance of a body to change its state of motion
Acceleration
Rate of change in velocity
Reaction
For every force that is exerted, there is an equal and opposite force exerted by the second body on the first
Types of motion
- Linear
- Angular
- General
Linear motion
- Straight Line
- All body parts moving in the same direction at the same speed
Angular motion
Swinging your arm back in a tennis serve
Circular or rotational movement
General motion
A combination of linear and angular motion
Weight
The gravitational pull that the earth exerts in a body
Friction
The force that opposes the motion of two surfaces in contact
Air resistance
The force that opposes the motion through the air
Streamlining
The creation of smooth air flow around an aerodynamic shape to minimise air resistance
Reliability
The extent to which an experiment, test or measuring procedure gives the same results after repeated trials.
How to reduce effects of air resistance
Surface (clothing)
Shape
Mass
Design more efficient equipment in wind tunnels
Improve position on bike in wind tunnels
