A car's position on a straight road is 0 m at 0 s, 36 m at 6 s, and still 36 m at 9 s.
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A car's position on a straight road is at , at , and still at . Find its velocity in the first and in the after that.
Need a reminder? The key ideaShow
On a distance-time (or position-time) graph the slope is the velocity. On a velocity-time graph the slope is the acceleration and the area under the line is the distance.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. First part. .
Step 2. Second part. : the car stopped.
Answer: , then .
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