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speed 8 bennett
Transcript of speed 8 bennett
Motion is defined by its change in position relative to a reference point.
A reference point is a place or an object that seems to be staying still.
One could give a description relative to a reference point as to which way an object is moving using reference directions- north, south, east, west, south, up, or down.
A common reference point used to figure out whether or not something is moving is Earth's surface. Trees, buildings, and various other non-moving objects are very useful reference point too. Speed can be easily determined by the equation of the distance traveled by the object over the time it took for that object to travel that distance. (D/T)
The method most often used for determining the distance traveled is using the reference point that we mentioned in the motion notes.
The SI unit of speed is meter over seconds represented as m/s. Although this is the SI unit, you can represent speed in many different units such as miles per hour, kilometers per hour, and feet per second. This is a high speed train with a blurring picture because of the camera not being able to collect all the color particles in the time the train was there. X Axis Y Axis Constants of Speed Speed is mostly not constant
It usually varies over time
Instantaneous speed is the speed of an object at a certain time.
Average speed is only the average of different speeds over time.
Speed is usually not constant because the forces of gravity are always making the object go slower or faster. In reference to the helicopter, the people are going down or southwards even though the helicopter is moving too. More on Reference Points As you now know, reference points can be moving or non-moving, but how is this possible?
In reference to a moving object, another moving object is described by using reference directions.
A few common reference directions include: north, south, left, right, east, west, up, and down.