Hello, I'm doing a big physics lab for my extended essay (IB diploma). I'm exploring two things, where my question is what affects the stability of a bicycle more, velocity or the weight on the bicycle? So for the first variable velocity, i pushed the bicycle in different strengths to alter velocity and observe how long they go. For the second variable, i tried to keep the velocity the same as possible and added weight to observe the stability. So here is my first question: For both of these variables, what should my hypothesis (expected outcomes) to be? for velocity, as velocity increases stability would increase too (my prediction), but for weight, i'm not so sure since it could be also directly proportional due to gravity but also it could be the opposite due to the increase in torque to fall down sideways. What do you predictwill happen? here is my second question: what are the calculations i can use for these to support / analyse the results? i can see that i can use torque to see how the bicycle falls, but i need more calculations to do.. some ppl suggested angular momentum, law of conservation etc.. could anyone explain this a bit more specifically please? i know i'm asking a lot of things, but it would be really, really helpful if you could spend some time helping me, this is really important for me. I promise i'll give ur help back sometime later when you need it:-) thank you very much again and have a nice day!!