# Kinematics-Average Speed and Instantaneous Velocity (NEET Physics): Questions 88 - 92 of 108

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## Question number: 88

» Kinematics » Average Speed and Instantaneous Velocity

### Question

A rifle man, who together with his rifle has a mass of 100 kg, stands on a smooth surface fires 10 shots horizontally. Each bullet has a mass 10 gm and a muzzle velocity of 800 m/s. What velocity does rifle man acquire at the end of 10 shots?

### Choices

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

a. | 0.3 m/s | |

b. | 1.2 m/s | |

c. | 0.5 m/s | |

d. | 0.8 m/s |

## Question number: 89

» Kinematics » Average Speed and Instantaneous Velocity

### Question

In the figure shown, the velocity of each particle at the end of 4 sec will be -

### Choices

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

a. | 2.18 m/s | |

b. | 0.872 m/s | |

c. | 0.218 m/s | |

d. | 8.72 m/s |

## Question number: 90

» Kinematics » Average Speed and Instantaneous Velocity

### Question

The mass of a rocket is 500 kg and the relative velocity of the gases ejecting from it is 250 m/s with respect to the rocket. The rate of burning of the fuel in order to give the rocket an initial acceleration 20 m/s ^{2} in the vertically upward direction (g = 10 m/s ^{2}), will be –

### Choices

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

a. | 45 kg/s | |

b. | 10 kg/s | |

c. | 60 kg/s | |

d. | 30 kg/s |

## Question number: 91

» Kinematics » Average Speed and Instantaneous Velocity

### Question

rifle man, who together with his rifle has a mass of 100 kg, stands on a smooth surface fires 10 shots horizontally. Each bullet has a mass 10 gm and a muzzle velocity of 900 m/s. What velocity does rifle man acquire at the end of 10 shots.

### Choices

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

a. | 0.3 m/s | |

b. | 0.6 m/s | |

c. | 0.9 m/s | |

d. | 0.5 m/s |

## Passage

Read the passage given below and answer the questions that follow:

A small particle of mass m/10 is moving horizontally at a height of *3R/2 * from ground with velocity 10 m/s. A perfectly inelastic collision occurs at point P of sphere of mass *m * placed on smooth horizontal surface. The radius of sphere is *R, (m = * 10 kg and *R = * 0.1 m) (Assume all surfaces to be smooth).

## Question number: 92 (1 of 3 Based on Passage) Show Passage

» Kinematics » Average Speed and Instantaneous Velocity

### Question

A small particle of mass m/10 is moving horizontally at a height of *3R/2 * from ground with velocity 10 m/s. A perfectly inelastic collision occurs at point P of sphere of mass *m * placed on smooth horizontal surface. The radius of sphere is *R, (m = * 10 kg and *R = * 0.1 m) (Assume all surfaces to be smooth).

Angular speed of sphere just after collision is

### Choices

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

a. | 2.5 rad/sec | |

b. | 3 rad/sec | |

c. | Zero | |

d. | 2 rad/sec |