# V/T graph to P/T graph

pebbles3

## Homework Statement

I have to calculate the displacements from a velocity-time graph to make a position-time graph.
The velocity-time graph from the question is attached.

d=vt

## The Attempt at a Solution

To calculate the values for a position-time graph, I first converted all the velocities from km/h to km/min to match the time.
The truck travels at 70 km/h (1.16 km/min) for 10 mins: 1.16 x 10 = 11.6
It then travels at 80 km/h (1.33 km/min) for 30 mins: 1.33 x 30 = 40
It then travels at 75 km/h (1.125 km/min) for 5 mins: 1.25 x 5 = 6.25
It then travels at 60 km/h (1.0 km/min) for 2.5 mins: 1.0 x 2.5 = 2.5
And then travels at 55 km/h (0.9 km/min) for 22.5 mins: 0.91 x 22.5 = 20.6

I drew a position-time graph which is attached. I just want to know if I did this right because the graph I made looks a little weird to me.

#### Attachments

• 2.jpg
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• 1.jpg
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Since the truck keeps traveling in the same direction, how is it that your position graph shows it reversing direction?

pebbles3
Since the truck keeps traveling in the same direction, how is it that your position graph shows it reversing direction?

Ah, I think I've got it now. Does this look right?

#### Attachments

• 3 (2).jpg
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