Recent content by luciaalmiron

Ahh okay, this clears things up more, thank you. I’ll give this a shot.

Apologies I didn’t specify, I mean pushing the pedals with approximately the same force to calculate the coefficient of friction of various surfaces.

Sorry, I don’t think I specified properly, I’m trying to calculate the coefficient of friction (μ)of different surfaces using a bike, where I can calculate the centripetal acceleration using an app. Would skidding and accelerating give me two different numbers for μ? I’m trying to find the most...

Thank you very much, I’ll give this a shot later to see if I get accurate results.

That’s strange as my graph only took a few data points, your’s far more detailed than when I exported the data to files on my phone, I’ll give it a shot exporting it to my phone. Yes I suppose there are a lot more factors that influence the accuracy of results, however as I have to write a...

OK, so theoretically the coefficient=a/g, since there are m’s on both numerator and denominator. So as long as I push with the same force on each surface the acceleration should be different, therefore giving me different results?

I think I’m going to try skidding for the kinetic friction and then do a separate equation for rolling friction, though I need to investigate more about the rolling friction as it requires a different formula and Ím not sure if that would be harder.

Thanks, this makes sense, I’ve been thinking of doing this: F(applied to the pedal) - Fr (friction)= m•a 1.5• weight - m•g•friction = m•a I could calculate the force applied to the pedal by estimating that it is approximately 1.5 times the riders body weight for a moderate push. On the other...

To begin my partner was on the bike, I tapped “record” so that the app would start measuring data and then he started cycling in a space of approximately 8 meters. That was all the data that the app gathered, it was more of a “test run” since we are still investigating to see if we can get more...

The assignment just says to create a physics experiment using the app “Phyphox” to collect data then make a video and present out results. Me and my physics partner have chosen to see the different coefficient of friction on different surfaces using a bike to see the different velocities on...

Hello! That looks like a more accurate graph than mine, and strangely enough I was riding on a flat road, no grass. What’s the name of that app? I think I’m going to try this one out for more specific results.

Thank you for this explanation, I think your proposed way is more efficient in terms of analysing data. I’ll give it a shot to see if I can get different results for the different surfaces.

Thank you for your answer, I think I’ll give that a try to see if it gives me better results.

TL;DR Summary: how can I calculate the acceleration of a bike whilst using phyphox? Calling all physics lovers who are willing to lend a hand, Hello, I’m busy doing a physics project on the friction force on different surfaces, like asphalt, grass, etc. I need to measure the data using an app...