Definitions
What is physics
the study of natural laws of the universe such as space, time, forces, motion, matter and energy
Does an object in motion change its position
yes
What are the 2 ways to express speed
Average and instantaneous
What is the SI unit for speed
meters per second
If a person walks 6 kilometers stops and walks another 4 kilometers. wha is the total displacement
10 kilometers
what is reference point
a point against which motion is measured
how quickly an object moves in relation to a reference point.
What is average speed
the ratio of the total distance traveled to. the total time of the trip
what does per mean in the equation
divide
If a person was 4 kilometers, then remembers he forgot his water bottle in the classroom, turns around and walks 2 kilometers-what is the person's displacement
Total displacement is 2 kilometers.
What is Displacement
the distance of an object travels plus the direction from the starting point
what is Velocity
tells you how quickly and in what direction the object is moving in relation to a reference point.
What is instantaneous speed
the rate at which an objet is moving at a given moment in time.
Equation for speed
V=D/T
What is a vector quantity
a physical movement that contains both magnitude and directional
How is speed described
in units of distance and time
Other common units for speed
kilometers per hour; feet per second, and miles per hour
a physical measurement that contains only magnitude and does not contain directional information