# Rotational Motion (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 1 - 6 of 125

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## Question number: 1

» Rotational Motion » Angular Momentum

### Question

Calculate the angular momentum of a body whose rotational energy is 10 joule. If the angular momentum vector coincides with the axis of rotation and its moment of inertia about this axis is 8 x 10 ^{-7} kg m ^{2}

### Choices

Choice (4) | Response | |
---|---|---|

a. | 2 x 10 | |

b. | 4 x 10 | |

c. | 6 x 10 | |

d. | All of the above |

## Passage

Consider a cylinder of mass *M =* 1 kg and radius *R =* 1 m lying on a rough horizontal plane. It has a plank lying on its top as shown in the figure.

A force F = 35 N is applied on the plank such that the plank moves and causes the cylinder to roll. The plank always remains horizontal. There is no slipping at any point of contact.

## Question number: 2 (1 of 3 Based on Passage) Show Passage

» Rotational Motion » Angular Momentum

### Question

Find the value of frictional force at *B*

### Choices

Choice (4) | Response | |
---|---|---|

a. | 4.5 N | |

b. | 5.0N | |

c. | 2.5 N | |

d. | All of the above |

## Question number: 3 (2 of 3 Based on Passage) Show Passage

» Rotational Motion » Angular Momentum

### Question

Find the value of frictional force at *A*

### Choices

Choice (4) | Response | |
---|---|---|

a. | 4.77 N | |

b. | 7.5 N | |

c. | 2.5 N | |

d. | All of the above |

## Question number: 4 (3 of 3 Based on Passage) Show Passage

» Rotational Motion » Angular Momentum

### Question

Calculate the acceleration of cylinder.

### Choices

Choice (4) | Response | |
---|---|---|

a. | 10 m/s | |

b. | 6.36 m/s | |

c. | 20 m/s | |

d. | None of the above |

## Question number: 5

» Rotational Motion » Angular Momentum

### Question

A wheel rotates with a constant acceleration of 2.0 radian/sec ^{2}. It the wheel starts from rest, the number of revolutions it makes in the first ten seconds will be approximately

### Choices

Choice (4) | Response | |
---|---|---|

a. | 32 | |

b. | 16 | |

c. | 24 | |

d. | 8 |

## Question number: 6

» Rotational Motion » Angular Momentum

### Question

If the earth is a point mass of 5 × 10^{24} kg revolving around the sun at a distance of 1.1 × 10^{8} km and in time T = 3.14 × 10^{7} s. Then the angular momentum of the earth around the sun is

### Choices

Choice (4) | Response | |
---|---|---|

a. | 1.5 x 10 | |

b. | 1.21 x 10 | |

c. | 1.21 x 10 | |

d. | 2.7 x 10 |