- #1
brotherbobby
- 700
- 163
We are aware of the well-known problem of a rotating physicist whose angular velocity ω increases as a consequence of angular momentun conservation (##I_1 \omega_1 = I_2 \omega_2, \Sigma \tau_e = 0##). I am assuming that the net external force (##\Sigma F_e##) is also zero along with the net external torque. However, the net momentum of the physicist (##p=mv##) increases. If indeed there is no net external force on the system, doesn't the increase in the physicist's speed imply a violation of Newton's law for extended objects (##\Sigma F_e = \frac{dp}{dt}##) ?