If I sit on a chair with my legs off the ground and I suddenly jerk my body forward, I move the chair forward. Why am I able to do this? Static friction might be a factor but if both the chair and I are one system how did I start moving in the first place? Are there any other factors at play besides static friction? any input is appreciated, thanks.
In: Physics
It’s really just static friction and rolling resistance, like you say. Without those your center of mass would stay in one place. Ask yourself if the same thing would happen flotaing in space, without the floor. No, so there are external forces acting on the system of you plus the chair.
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