NEET
- Exam
- NEET
- Subject
- Physics
- Chapter
- Rotational Motion
NEET · Physics · Rotational Motion
A disc of radius R is rotating with an angular speed ω o about a...
A disc of radius R is rotating with an angular speed ωoabout a horizontal axis. It is placed on a horizontal table. The coefficient of kinetic friction is µk.Calculate the time taken for the rolling to begin.
Options
- A\frac{2R{{\omega }_{o}}}{{{\mu }_{k}}\left( 1+\frac{m{{R}^{2}}}{I} \right)}
- B-\frac{R{{\omega }_{o}}}{{{\mu }_{k}}\left( 1+\frac{m{{R}^{2}}}{I} \right)}
- C\frac{R{{\omega }_{o}}}{{{\mu }_{k}}\left( 1-\frac{m{{R}^{2}}}{I} \right)}
- D\frac{R{{\omega }_{o}}}{{{\mu }_{k}}\left( 1+\frac{m{{R}^{2}}}{I} \right)}
Correct answer
D. \frac{R{{\omega }_{o}}}{{{\mu }_{k}}\left( 1+\frac{m{{R}^{2}}}{I} \right)}
Step-by-step solution
Correct Option is : (D)
$\frac{R{{\omega }_{o}}}{{{\mu }_{k}}\left( 1+\frac{m{{R}^{2}}}{I} \right)}
$\frac{R{{\omega }_{o}}}{{{\mu }_{k}}\left( 1+\frac{m{{R}^{2}}}{I} \right)}