## Class/Course - Class XI

### Subject - Physics

#### Chapter - Work, Energy and Power

Attention Class XI standard Aspirants! Just Exam provide a platform to all students who want to make practice for various subject online. We prepare this platform on the base of CBSE. If you want to join our unlimited test series, then please write us at info@justexam.in about your class/course

Dear User, Kindly login/register to view answer & explanation of each question. Click here to Login/Sign Up. | |

Q.1 A block of mass 5.0 kg slides down from the top of an inclined plane of length 3m. The first 1m of the plane is smooth and the next 2m is rough. The block is released from rest and again comes to rest at the bottom of the plane. If the plane is inclined 30^{0} with the horizontal, find the coefficient of friction on the rough portion . | |

$\frac{2}{\sqrt{3}}$ | |

$\frac{\sqrt{3}}{2}$ | |

$\frac{\sqrt{3}}{4}$ | |

$\frac{\sqrt{3}}{5}$ | |