What Is Physics? Flashcards
Physics
The science concerned with the fundamental laws of the universe.
What are some of the components physics deals with?
- Matter
- Energy
- Space And All their interactions
- Time
- Everything
What is motion?
Motions deals with a continuous change in the position of a body relative to a reference point, as measured by a particular observer in a particular point of reference.
Uniform Motion
Motion at a constant velocity, with no change in speed or direction
Non-Uniform Motion
Motion with changing speed, or direction, or both; motion in which velocity is changing
What is non-uniform motion also known as?
Accelerated motion
What are the types of quantities used in physics?
- Scalar
- Vector
- Reference Point
Scalar
A physical quantity that has magnitude (size) and unit but not direction. (Ex. distance, time, speed)
Vector
A physical quantity that has magnitude (size), unit was well as direction. (Ex. position, displacement, velocity, acceleration)
Reference Point
The point from which position is measured; usually the origin or starting point
Distance
The total length of a journey along very twist turn of the path
Is distance scalar or vector?
Scalar
Position
An object’s location as seen by an observer from a specific viewpoint or reference point
Is position scalar or vector?
Vector
Displacement
The change in position of an object
Is displacement scalar or vector?
Vector
Time (or change/delta time)
The duration of an event
Is time vector or scalar?
Scalar
Speed
How fast something is moving
Is speed vector or scalar?
Scalar
Velocity
How fast an object’s position is changing, that is, the rate of change of position
Is velocity vector or scalar?
Vector
Instantaneous Velocity
The velocity of an object at a specific moment
Is Instantaneous Velocity scalar or vector?
Vector
Acceleration
How much an object’s velocity changes in a certain time; rate of change of velocity
