# Kinematics-Uniformly Accelerated Motion [NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 6 - 9 of 23

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## Question number: 6

» Kinematics » Uniformly Accelerated Motion

### Question

A grind stone starts from rest and has a constant-angular acceleration of 6.0 rad/sec2. The angular displacement and angular velocity, after 4 sec. will respectively be

### Choices

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

a. | 32 rad, 64 rad/s | |

b. | 48 rad, 24 rad/s | |

c. | 64 rad, 32 rad/s | |

d. | 16 rad, 32 rad/s |

## Question number: 7

» Kinematics » Uniformly Accelerated Motion

### Question

The angular velocity of a particle is given by co = 5t - 3t ^{2} + 1, the time when its angular acceleration decreases to be zero will be -

### Choices

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

a. | 25 sec | |

b. | 1.2 sec | |

c. | 0.83 sec | |

d. | 0.25 sec |

## Question number: 8

» Kinematics » Uniformly Accelerated Motion

### Question

The magnitude of the linear acceleration of the particle moving in a circle of radius 10 cm with uniform speed completing the circle in 4 s, will be –

### Choices

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

a. | 2.5 π | |

b. | 2.5π cm/s | |

c. | 5 π cm/s | |

d. | 5 π |

## Question number: 9

» Kinematics » Uniformly Accelerated Motion

### Question

The total mass of an elevator with a 80 kg man in it is 1000 kg. This elevator moving upward with a speed of 8 m/sec, is brought to rest over a distance of 16m. The tension T in the cables supporting the elevator and the force exerted on the man by the elevator floor will respectively be

### Choices

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

a. | 624 N, 78 N | |

b. | 624 N, 7800 N | |

c. | 78 N, 624 N | |

d. | 7800 N, 624 N |