# distance time graphs

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• Created by: tia5sos
• Created on: 15-10-20 16:45
• distance time graphs
• tells you how far something has travelled
• the different parts of a d-t graph describe the motion of an object:
• the gradient (slope) at any point gives the speed of the object.
• flat sections are where its stopped
• a steeper graph means its going faster
• curves represent acceleration.
• a steepening curve means its speeding up ( increasing gradient)
• a levelling off curve means its slowing down (decreasing gradient)
• the speed of an object can be found from a distance - time graph
• 1. the gradient of a d-t graph at any point is equal to the speed of the object at that time.
• 2. if the graph is a straight line, the gradient at any point along the line is equal to change in velocity divide change in the horizontal.
• 3. if the graph is curved, to find the speed at a certain time you need to draw a tangent to the curve at that point, and then find the gradient of the tangent.
• 4. you can also calculate the average speed of an object when it has a non- uniform motion (accelerating) by dividing the total distnace travelled by the time it takes to travel that distance.