Qstnid -I-7-a Smooth Block Loosely Fits In A Circular Tube Placed On A Horizontal Surface. The Block Moves In A Uniform Circular Motion Along The Tube. Which Wall (Inner Or Outer) Will Exert A Nonzero Normal Contact Force On The Block? <Span Style="background-color: #Ffff00;">figure</span></span> - 07: Circular Motion

with Solutions -

#7
A smooth block loosely fits in a circular tube placed on a horizontal surface. The block moves in a uniform circular motion along the tube. Which wall (inner or outer) will exert a nonzero normal contact force on the block?
Figure
Ans : The outer wall will exert a non-zero normal contact force on the block. As the block moves in a uniform circular motion, centrifugal force in radially outward direction acts on it and it comes in contact with the outer wall of the tube.