Physics Final
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The particle model represents a moving object as:
A series of dots showing position at equal time intervals
A motion diagram includes:
Vectors representing velocity and acceleration
A scalar quantity includes:
Magnitude only
A vector quantity includes:
Magnitude and direction
The magnitude of a vector refers to its
Size
Displacement is
Change in position
Average velocity is defined as
Displacement divided by time
Instantaneous velocity is
The velocity at a single moment
Acceleration is defined as
The rate of change of velocity
Average acceleration is
Change in v/t
The rate of free-fall acceleration on earth is
9.8m/s^2
Force is measured in
Newtons
A free body diagram shows
Forces acting on the object
Newton’s second law states
F=ma
Newton’s first law describes
Inertia
Newton’s third law refers to
Equal and opposite force pairs
Inertia is the tendency of an object to
Resist changes in motion
An object is in equilibrium when
The net force is zero
The gravitational field strength on earth is
9.8 n/kg
Weight is calculated as
Mass x gravitational field strength
Drag force acts
Opposite the direction of motion
Terminal velocity occurs when
Gravity=drag force
An interaction pair consists of
Action-reaction forces on two interacting objects
Tension in a rope is always
A pulling force