The narrow tube AC forms a quarter circle in a vertical

Last updated: 6/14/2023

The narrow tube AC forms a quarter circle in a vertical plane A ball B has an area of cross section slightly smaller than that of the tube and can move without friction through it B is placed at A and displaced slightly During the motion from A to C it will a Always be in contact A with the lower surface of the tube b Always be in contact with the upper surface of the tube B do c Initially be in contact with the lower surface and later with the upper surface d Initially be in contact with the upper surface and later with the lower surface