- #1
gandharva_23
- 61
- 0
consider a funnel rotating about its axis with a constant angular speed w . A small particle remains at rest w.r.t. the wall of the funnel . If we solve the problem in particles reference frame we have a centrifugal force mw^2 r whose component will be tending to move the particle up the funnel's wall . Hence i can say that for certain values of w frictional force will be acting in the downward direction . Now i want to solve the problem in the groung frame . If i analyse the problem in ground frame there is no force that is tending to take the particle up the wall so friction force can never act down the wall ...