Velocity-Time Graphs and Acceleration. What does a v-t graph look like? Time is marked on the horizontal axis and velocity is on the vertical. Graphs.

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Presentation transcript:

Velocity-Time Graphs and Acceleration

What does a v-t graph look like? Time is marked on the horizontal axis and velocity is on the vertical. Graphs that represent an object’s velocity versus its time.

What can we determine from a velocity time graph? Velocity and speed Time Acceleration Displacement and distance

What can we determine from a velocity time graph? Velocity - reading directly off the y-axis

What can we determine from a velocity time graph? Time (read off the x-axis)

What can we determine from a velocity time graph? Displacement = area under the curve NOTE: Area formulas: –Area rectangle = length x width –Area triangle = ½ base x height

What can we determine from a velocity time graph? Acceleration = v/t = slope

What can you find from a v-t graph Acceleration = slope at a point on the graph (you may have to use a tangent) Average acceleration = finding the slope of a segment (use the start and end points)

Velocity-Time Graphs

Interpreting v-t graphs Horizontal lines show uniform motion (constant speed and direction). Inclined lines show change in speed or direction, or both: in other words accelerated motion.