I was doing a course on Brilliant today when I came across this question:

[![Question](https://i.stack.imgur.com/Bmrul.png)](https://i.stack.imgur.com/Bmrul.png)

> 
> In the picture, the question asks me what actions that must be done in order to maximize the distance I travel during takeoff from the curved ramp, and presents me with three choices: **Stand up** , **Duck down** or **Do nothing**. 
> 
> 
> 

I was really puzzled by this question so I went to get the explanation instead. This was what came up: 

[![stand_up?](https://i.stack.imgur.com/MfpRl.png)](https://i.stack.imgur.com/MfpRl.png)

The correct answer was to stand up. However, after getting the explanation, I was still puzzled about how standing up will "shorten the radius of the curve around which she is traveling". (I do know that "shortening the radius of the curve around which she is traveling" will reduce R and will let the biker's velocity increase. I am puzzled about *how* that action can reduce R) Can anybody help?