1 - Newtons Laws of Linear Motion Flashcards
Define Linear Motion?
Linear motion is motion in a straight or curved line, with all body parts moving the same distance at the same speed in the same direction.
Name an example of Linear Motion?
- A 100m athlete will travel with linear motion in a straight line during their race.
- A 200m athlete will also travel with linear motion in a curved line when running the bend.
Define Newton’s First Law?
A force is required to change the state of motion.
Define Newton’s Second Law of Acceleration?
The magnitude (size) and direction of the force determines the magnitude and direction of the acceleration.
What is the formula for Newton’s Second Law?
F = ma (force = mass x acceleration)
Define Newton’s Third Law?
For every action (force) there is an equal and opposite reaction (force).
Define a first class lever?
The fulcrum lies between the effort and resistance.
Define a Second Class Lever?
The resistance is between the fulcrum and effort.
Define a Third Class Lever?
The effort is between the fulcrum and the resistance.
Define a mechanical advantage?
When the force arm is longer than the resistance arm.
Define a Mechanical Disadvantage?
Where the resistance arm is longer than the force arm.
Define the Fulcrum?
The point about which the lever rotates.
Define the resistance?
The weight to be moved by the lever system.
Define the effort?
The force applied by the user (muscle) of the lever system.
What’s the memory tool to remember speed distance and time?
Distance
Speed x time
