speed vs time graph for uniform motion
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Answer:
Velocity-time graphs are used to describe the motion of objects which are moving in a straight line. They can be used to show acceleration and to work out displacement.
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Speed-time graphs
Speed-time graphs are very useful when describing the movement of an object.
We can use them to determine whether or not the object is moving at any point in time. We can also use them to see what speed the object is travelling at that point in time.
Using data from the graph, we can calculate any acceleration, the change in speed and the change in time.
We can also use graphs to calculate distance travelled. The area under a speed-time graph represents the distance travelled.
This is a velocity time graph of an object moving in a straight line due North.
Uniform acceleration 0-9, constant velocity, uniform acceleration 9-5, constant acceleration, constant acceleration 5-0
The displacement of this object is the area of the velocity time graph. To calculate the displacement we need to calculate the area. This means dividing the “area” into a series of triangles and rectangles that allows us to determine the overall displacement. In this case the displacement is 118m.
In this case the object starts from rest, accelerates for 6s. It stays at a constant velocity of 9ms-1 for 4s then slows down to 5ms-1 in a further 4s. I travels at 5ms-1 for another 4s then rapidly slows down and comes to rest.
A horizontal line on a speed-time graph represents a constant speed.
A sloping line on a speed-time graph represents an acceleration. The sloping line shows that the speed of the object is changing. The object is either speeding up or slowing down.
The steeper the slope of the line the greater the acceleration. If the line slopes downwards from left to right on the graph, this means that the object is slowing down. This motion is sometimes referred to as a 'deceleration'. However remember that a 'deceleration' is really just a special kind of 'acceleration'. It is an acceleration where the speed of the object is decreasing with time.
Answer:
Hello mate ✌✌
First of all speed/velocity time graph under a uniform motion is a slope which when a straight line parallel to the time axis denotes uniform or constant velocity ,Or if it is a straight line from the point of reference with an acute angle means positive/uniform acceleration Or when it is a straight line from the highest point with an obtuse angle , it denotes uniform retardation/positive retardation/deacceleration.
see the following pic to get the summary digramatically.
Hope it helps ✌☺️