01-16-2021, 01:03 PM
(This post was last modified: 01-19-2021, 01:52 PM by Roland Van Kerschaver.)
(01-15-2021, 02:45 AM)solid Wrote: Probably the bike "jumps" a little on the treadmill due to some asymmetry of the wheel. The oscillation period corresponds well to the rotation speed (1.3 rad/s): 2*%pi / 1.3 rad/s * 9 rotations = 43.5 s ..
In addition to the oscillations there is a strange increase of the average acceleration with time.
Wheel
Raw data
Accelerator x
Gyroscope z
Other interesting examples are most experiments that measure centripetal acceleration by rotating a phone (for example in a salad spinner or on a record player) and experiments in which the phone is placed in a tire or a roll to measure its velocity.
Rotating on a record player = rotating on a horizontal bike wheel