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Physics Lesson 3.10.2 - Speed verse Time Graph in Uniform Motion
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Welcome to our Physics lesson on Speed verse Time Graph in Uniform Motion, this is the second lesson of our suite of physics lessons covering the topic of Velocity v's Time and Speed v's Time Graph, you can find links to the other lessons within this tutorial and access additional physics learning resources below this lesson.
Speed verse Time Graph in Uniform Motion
As we have explained in the tutorial "Speed and Velocity in One Direction", the speed cannot be negative (and time as well). Therefore, the Speed vs Time graph will contain only the upper-right part of a two dimensional graph. Let's explain this point by considering the numerical values of the previous example. Any negative part of the Velocity vs Time graph is flipped vertically and it will be considered as positive in the corresponding Speed vs Time graph as shown below.
The total Distance stot will therefore be:
= v1 × t1 + v2 × t2
= 12 m/s × 10 s + 4 m/s × 15 s
= 120 m + 60 m
= 180 m
The above results comply with the numerical values of the area enclosed by the graph and the horizontal axis. If the graph in the velocity vs time graph is in the negative part, the area is taken as negative. Therefore, we obtain a very important property of the Velocity vs Time and Speed vs Time graphs:
- The area under (or above when negative) of the Velocity vs Time graph gives the Displacement, and
- The area under the Speed vs Time graph gives the Distance.
You have reach the end of Physics lesson 3.10.2 Speed verse Time Graph in Uniform Motion. There are 4 lessons in this physics tutorial covering Velocity v's Time and Speed v's Time Graph, you can access all the lessons from this tutorial below.
More Velocity v's Time and Speed v's Time Graph Lessons and Learning Resources
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- Speed Time Feedback. Helps other - Leave a rating for this speed time (see below)
- Kinematics Physics tutorial: Velocity v's Time and Speed v's Time Graph. Read the Velocity v's Time and Speed v's Time Graph physics tutorial and build your physics knowledge of Kinematics
- Kinematics Revision Notes: Velocity v's Time and Speed v's Time Graph. Print the notes so you can revise the key points covered in the physics tutorial for Velocity v's Time and Speed v's Time Graph
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- Check your calculations for Kinematics questions with our excellent Kinematics calculators which contain full equations and calculations clearly displayed line by line. See the Kinematics Calculators by iCalculator™ below.
- Continuing learning kinematics - read our next physics tutorial: Acceleration v's Time Graph
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