Newton's Laws, Force and Technology Flashcards
What does biomechanics enable performers and coaches to do?
- Analyse performance
- Maximise movement efficiency and sporting technique
- Reduce or prevent injuries
- Design and choose the correct equipment to satisfy the demands of the activity
What are Newton’s laws of motion?
- Newton’s First Law (Law of Inertia)
- Newton’s Second Law (Law of Acceleration)
- Newton’s Third Law (Law of Reaction)
What is Newton’s First Law?
” A body continues in a state of rest or uniform velocity unless acted upon by an external or unbalanced force”
What is inertia?
The resistance of a body to change its state of motion, whether at rest or while moving
What is Newton’s Second Law?
” A body’s rate of change in momentum is proportional to the size of the force applied and acts in the same direction as the force applied”
What is Newton’s Third Law?
” For every action force applied to a body there is an equal and opposite reaction force”
How do you calculate velocity?
Velocity = displacement
——————–
time
How do you calculate momentum?
Momentum = Mass x Velocity
How do you calculate acceleration?
Acceleration = (final velocity - initial velocity)
——————————————-
time
How do you calculate force?
Force = Mass x Acceleration
What is ‘net force’?
The sum of all forces acting on a body
What 5 effects can force have on a body?
- Can create motion
- Can accelerate a body
- Can decelerate a body
- Can change the direction of a body
- Can change the shape of a body
What are the vertical forces acting on a body?
Weight and Reaction
How is weight calculated?
Weight = Mass x Acceleration due to gravity(10)
What are the horizontal forces acting on a body?
Friction and Air Resistance
