Question

Tell the right answer.
Don't spam otherwise it will be reported!!!!​

Answer 1

$\huge{\orange{\overbrace{ \red{ \overbrace{\red{\underbrace \color{blue} {\underbrace \color{black} {\fcolorbox{magenta}{lime}{\fcolorbox{red}{black}{\fcolorbox{pink}{pink}{ \fcolorbox{blue}{blue}{{\bf{{{{\pink{AnSwEr}}}}}}}}}}}}}}}}}}$

(a) When the shaft BB' is turned through 90° the platform must start turning with angular velocity Ω so that the angular momentum remains constant.

• Here If the shaft is turned through 180°, angular velocity of the sphere changes sign. Thus from conservation of angular momentum, (Here -Io ωo is the complete angul.

(b) In the case (a), first part, the angular momentum vector of the sphere is precessing with angular velocity Ω. Thus a torque

Answer 2

Answer:

hope this is helpful............