Dynamics Flashcards
System diagram
A simple sketch of all objects in a sittuation
Free body diagram
A simple drawing of an object with forces
Applied force
A general force caused by one object onto another
Tension
Pulling force on one object by another
Normal force
Perpendicular force to the object when in contact with a surface
Friction
Opposes the sliding of two surfaces across one another
Gravity
Force of attraction between two objects
Net force
Sum of all forces on an object
Newton’s first law
If the net external force on an object is zero, the object will move at a constant velocity, if it be at rest or in movement
What will/not affect Newtons first law
- a non-zero net force will change velocity
- Fnet not required to maintain velocity
- internal forces have no effect on the motion of the object
Newtons second law
Ony occurs when there is a non-zero acceleration
Net force is equal to mass x acceleration
Fnet = ma
Newtons third law
For every action there is an equal and opposite reaction
Action=reaction
The force of gravity factors in weight
- mass of an object causing the gravitational pull
- mass of the object which gravity is acting on
- the distance separating the two objects
UGC
Universal Gravitational Constant
Static friction
Prevents sliding of two surfaces, needs to be overcome to get an object moving
