Unit 3: 1D Forces and Motion Flashcards
Free Body Diagram
illustration used to visualize the applied forces, movements, and resulting reactions on a body in a given condition
Weight
Mass*Gravity
Net Force
the vector sum of all the forces that act upon an object
Velocity Time Graph
slope of line is equal to the acceleration
The difference between velocity and acceleration
Velocity measures a change in displacement, whereas acceleration measures a change in velocity. An object is accelerating if it’s changing its velocity.
Average Acceleration
depends only on the starting and ending velocity. it varies depending upon the time interval chosen.
Acceleration can still occur even when speed is constant when
a change in direction occurs
Free Fall
the motion of an object when gravity is the only force acting upon it
Free Fall Acceleration
the only force accelerating the object is gravity
As the distance from the earth increases
free fall acceleration decreases
Force
a push or a pull
system
objects of interest (excluding the external system)
Agent
cause of the force
Field force
exerted without contact
Contact Forces
an object from the external system comes into contact with the system and produces an effect
Newtons Second Law
Acceleration of an object is proportional to the net force, and inversely proportional to the mass
Newtons First Law
an object will not change its motion unless a force acts on it
Newtons Third Law
when two objects interact, they apply forces to each other of equal magnitude and opposite direction
Inertia
the tendency of an object to resist changes in motion
Equilibrium
net force on an object is zero
Gravitational Field
vector quantity that relates mass to gravitational force at a given location
Apparent Weight
support force exerted on an object
(Apparent weight) Upward Acceleration: the net force will be upward and the scale will read
greater than your weight
Weightlessness
no contact forces acting to support the object, meaning that the apparent weight is zero
Terminal Velocity
Constant velocity is reached when the drag force equals gravity
