# NEET Physics: Questions 174 - 179 of 2099

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## Question number: 174

» Kinematics » Average Speed and Instantaneous Velocity

### Question

An air craft executes a horizontal loop of radius 1 km with a steady speed of 900 km/h. The ratio of centripetal acceleration to that gravitational acceleration will beta)

### Choices

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

a. | 6.38: 1 | |

b. | 2.25: 9.8 | |

c. | 2.5: 9.8 | |

d. | 1: 6.38 |

## Question number: 175

» Kinematics » Average Speed and Instantaneous Velocity

### Question

A body is projected downdwards at an angle of 30° to the horizontal with a velocity of 9.8 m/s from the top of a tower 29.4 m high. How long will it take before striking the ground?

### Choices

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

a. | 3s | |

b. | Is | |

c. | 4s | |

d. | 2s |

## Question number: 176

» Kinematics » Average Speed and Instantaneous Velocity

### Question

A ball projected with speed ‘u’ at an angle of projection 15° has range R. The other angle of projection at which the range will not be same with same initial speed ‘u’ is

### Choices

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

a. |
90° | |

b. |
35° | |

c. |
45° | |

d. |
75° |

## Question number: 177

» Kinematics » Average Speed and Instantaneous Velocity

### Question

A body of mass 2 kg lying on a smooth surface is attached to a string 3 m long and then whirled round in a horizontal circle making 60 revolution per minute. The centripetal acceleration will be

### Choices

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

a. | 1.18 m/s | |

b. | 2.368 m/s | |

c. | 23.68 m/s
| |

d. | 118.4 m/s |

## Question number: 178

» Laws of Motion » Centripetal Force

### Question

A body of mass 0.1 kg is moving on circular path of diameter 1.0 m at the rate of 10 revolutions per 31.4 seconds. The centripetal force acting on the body is -

### Choices

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

a. | 0.2 N | |

b. | 4N | |

c. | 2N | |

d. | 0.4 N |

## Question number: 179

» Kinematics » Motion in a Plane

### Question

The height y and the distance x along the horizontal at plane of the projectile on a certain planet (with no surrounding atmosphere) are given by y = (8t - 5t2) metre and x = 6t metre where t is in second. The velocity with which the projectile is projected is

### Choices

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

a. | 6 m/s | |

b. | 8 m/s | |

c. | 10 m/s | |

d. | Data is insufficient |