Velocity-Time Graphs What is it and how do I read one?

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Presentation transcript:

Velocity-Time Graphs What is it and how do I read one?

Graphing Acceleration: Speed vs. Time Graphs Speed is increasing with time = accelerating

Velocity-Time Graphs 1) Line is straight = constant velocity, zero acceleration time (s) velocity (m/s) N S Object is moving at a constant velocity North.

Velocity-Time Graphs A horizontal line on the V-T graph means constant velocity. time (s) velocity (m/s) N S Object is moving at a constant velocity South.

Velocity-Time Graphs If an object isn’t moving, its velocity is zero. time (s) velocity (m/s) N S Object is at rest

Graphing Acceleration: Speed vs. Time Graphs 1)In Speed vs. Time graphs: Acceleration = Rise/Run = 4 m/s ÷ 2 s = 2 m/s 2 Run = 2 s Rise = 4 m/s

Velocity-Time Graphs V-T graph has positive slope. time (s) velocity (m/s) N S Positive velocity and positive acceleration: object is speeding up! time (s) velocity (m/s) N S Negative velocity and positive acceleration: object is slowing down.

Velocity-Time Graphs V-T graph has negative slope. time (s) velocity (m/s) N S Positive velocity and negative acceleration: object is slowing down, time (s) velocity (m/s) N S Negative velocity and negative acceleration: object is speeding up! (in negative direction)