A scooter goes round a circular roundabout of radius 21 m at a steady speed, taking 33 s for one…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A scooter goes round a circular roundabout of radius at a steady speed, taking for one round. Use . (a) How far does it go in one round? (b) What is its speed? (c) What is its displacement after one full round?
Need a reminder? The key ideaShow
Moving round a circle at a steady speed is accelerated motion, because the direction keeps changing. Speed , where is the time for one turn; the frequency is .
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) .
Step 3. (c) Back at the start: displacement .
Answer: ; ; .
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