[Cycloid]

t’s the Festive Season, a time for jollity and conundrums.
These may not be too demanding sitting down at home, but may be worth trying on your mates in the cafe after 40 hard miles

1)  It’s the Christmas Time Trial. Rider #9 sets off and rides down the road at 20mph. One minute later Rider #10 starts and rides at 30mph. 
How far along the road is it before number 10 catches his minute man?
Assume no time is lost accelerating up to speed.

2)  A man who weighs 14st 4lbs  pumps up both tyres on his bike to 100psi. He then gets on the bike
  What is the pressure in each of his tyres?
Assume his weight is equally distributed between both wheels. The Gatorskin tyre casing is rigid.

3) When you are riding along the road, do your wheels go round and round?
Discuss.

4) You have just finished your training ride and are pottering home for the last couple of miles. 
It starts to rain with big drops falling vertically from the sky. The tumble dryer is broken and you want to stay as dry as possible.
Do you a) Carry on riding slowly? Or b) Ride as fast as you can to get home sooner?
Assume you have perfect mudguards, so no road spray.
 

Topic

[Tom_77]

1. 1 mile

1. 1 mile

2. 100 psi

3. No, the world revolves around me

4. As fast as possible, although it makes very little difference – https://www.sciencefocus.com/planet-earth/do-you-get-wetter-if-you-run-or-walk-in-the-rain/

[mdavidford]

1. He doesn’t. TTs are so

1. He doesn’t. TTs are so phenomenally dangerous that the whole thing is called off due to it causing a massive accident before he has the opportunity.

2. Trick question. He’s a fatty, so he would be riding large tyres at lower pressures.

3. Only so long as there isn’t a Very Important Driver who requires me to pull over out of their way.

4. c) I ride slowly and cautiously and pull over and stop every time I encounter a Very Important Driver, cheerfully accepting the drenching as they speed through the puddles with a courteous wave in response.

[I may have collaborated with another regular poster on my answers – I hope that’s OK?]

[TheBillder]

1) You didn’t mention that no
1) You didn’t mention that no 10 had a diminutive friend in the race so we can’t tell*

2) If latex tubes, atmospheric pressure only. If tubeless, we won’t know until next week as they still haven’t seated. If butyl, it’s winter so we need to know where the thorns have been inserted.

3) No, it’s the wheels on the bus that do that. Were you not concentrating at nursery? Don’t they teach them anything nowadays?

4) Neither. You call nic mason to drive you home and you get there before the third drop has fallen, as there is no need to adjust speed or course for mini roundabouts or speed bumps.

Have I won?

*Supplementary question: what’s the smallest pet in the world?

[Author]

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