A trolley's velocity changes steadily from 3 m/s to 15 m/s in 8 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 trolley's velocity changes steadily from to in . (a) What is its acceleration? (b) Find the distance from the area under its velocity-time graph.
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. (a) .
Step 2. (b) .
Answer: ; .
Check. Rectangle plus triangle : .
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