how does speed-time graph look like when an object is moving with chaging seed?
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Answer:-
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.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.