A uniform disc with radius ๐ and a mass of ๐ kg is mounted centrally on a horizontal axle of negligible mass and length of 1.5๐. The disc spins counter-clockwise
Q. A uniform disc with radius ๐ and a mass of ๐ kg is mounted centrally on a horizontal axle of negligible mass and length of 1.5๐. The disc spins counter-clockwise about the axle with angular speed ๐, when viewed from the right-hand side bearing, Q. The axle precesses about a vertical axis at ๐๐ = ๐ โ 10 in the clockwise direction when viewed from above. Let ๐ ๐ and ๐ ๐ (positive upwards) be the resultant reaction forces due to the mass and the gyroscopic effect, at bearings P and Q, respectively. Assuming ๐2 ๐ = 300 m/s2 and ๐ = 10 m/s2, the ratio of the larger to the smaller bearing reaction force (considering appropriate signs) is ย ย ย ย ย
ย ย ย ย ย ย ย ย ย ย ย ย ย ย
Ans: -3
Sol:
