# Motion in one direction

sarah111
On a straight road, a car speeds up at a constant rate from rest to 20 m/s over a 5 second interval and a truck slows at a constant rate from 20 m/s to a complete stop over a 10 second interval. How does the distance traveled by the truck compare to that of the car?

## Answers and Replies

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On a straight road, a car speeds up at a constant rate from rest to 20 m/s over a 5 second interval and a truck slows at a constant rate from 20 m/s to a complete stop over a 10 second interval. How does the distance traveled by the truck compare to that of the car?
Hello sarah111. Welcome to PF !

What have you tried?

Where are you stuck?

You should show some work before anyone gives help.

... but, here's a hint:
What is the average velocity of each vehicle?​

sarah111
I feel like I can't answer the question because i don't know what the accceleration is. I tried using the equation for speed and found that the car stop 100m and the truck 200 but i don't feel that is right

azizlwl
On a straight road, a car speeds up at a constant rate from rest to 20 m/s over a 5 second interval and a truck slows at a constant rate from 20 m/s to a complete stop over a 10 second interval. How does the distance traveled by the truck compare to that of the car?

Sketch a velocity vs. time graph.
The car starts from rest and constantly increasing the speed until finally attained 20m/s after 5 secs.
The truck starts from 20m/s and constantly reducing the speed till zero.
Distance traveled is - velocity x time

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