Newton's Laws Of Motion Flashcards
What is Newton’s first law of motion?
It is also known as the law of inertia which states ‘A body continues in a state of rest or uniform velocity unless acted upon by an external or unbalanced force.’
What is the definition of force?
A push or pull that alters the state of motion of a body
What is a ‘body’?
A ‘body’ refers to an athlete such as a sprinter or an object such as a football
What is inertia?
The resistance of a body to change its state of motion, whether at rest or while moving
What is the definition of velocity?
The rate of change in displacement. It includes a directional element.
How to apply Newton’s first law of motion:
- 100m sprinter remains at rest in the starting blocks
- Until an external force that is large enough is able to overcome their inertia to create motion
- The body will reach a constant velocity and continue
- Until an external or unbalanced force acts upon them to change
What is Newton’s second law of motion?
It is also known as the law of acceleration which states that 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.
How to apply Newton’s second law of motion:
- The greater the force the 100m sprinter applies the greater the rate of change in momentum
- This will create acceleration away from the blocks
- Force is applied in a forward direction so sprinter drives towards the line
What is Newton’s third law of motion?
Also known as the law of reaction which states that for every action force applied to a body there is an equal and opposite reaction force
How to apply Newton’s third law of motion:
- The 100m sprinter applies a down and backward action force into the blocks
- The blocks will then provide an equal and opposite up and forward reaction force to the sprinter
- This allows the sprinter to drive them out of the blocks
What is the definition of momentum?
The quality of motion possessed
