Hi there, I've found some conceptual physics which i am confused about. Can anyone help me out? 1) Let's say if a particle is moving along an expanding spiral in a manner that the particle's normal acceleration remains constant. How will the linear and angular velocities change in the process? 2) If a vessel filled with water is moving horizontal with constant acceleration, ω. What shape will the surface of the liquid have? 3)Let's say if a vaccuum cleaner standing on the floor turns through a small angle when the switched is on and then stops. Why does that happen? Please kindly suggest your opinions! Thanks.