The hollow tube is pivoted about a horizontal axis through point
Oand is made to rotate in the vertical plane with a constant counterclockwise angular velocity
\theta ^(?)=3ra(d)/(sec). If a
0.2-lbparticle is sliding in the tube toward
Owith a velocity of
6f(t)/(sec)relative to the tube when the position
\theta =30\deg is passed, calculate the magnitude
Nof the normal force exerted by the wall of the tube on the particle at this instant.
