# Kinematics-Average Speed and Instantaneous Velocity (NEET Physics): Questions 43 - 47 of 108

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to **2099** questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 550.00 or

## Question number: 43

» Kinematics » Average Speed and Instantaneous Velocity

### Question

A particle is moving in a circular path with velocity varying with time as v = 1.5t-+ 2t. If the radius of circular path is 2 cm. the angular acceleration at t = 2 sec will be –

### Choices

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

a. | 400 rad/sec | |

b. | 4 rad/sec | |

c. | 0.4 rad/sec | |

d. | 40 rad/sec |

## Question number: 44

» Kinematics » Average Speed and Instantaneous Velocity

### Question

A particle moves in a circle of radius 10cm with a linear speed of 20m/s. The angular velocity will be –

### Choices

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

a. | 25 rad/s | |

b. | 75 rad/s | |

c. | 50 rad/s | |

d. | 200 rad/s |

## Question number: 45

» Kinematics » Average Speed and Instantaneous Velocity

### Question

The angular speed with which the earth would have to rotate on its axis so that a person on the equator would weigh (3/5) ^{th} as much as present, will be: (Take the equatorial radius as 6400 km)

### Choices

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

a. | 7.8 x 10 | |

b. | 7.8 x 10 | |

c. | 8.7 x 10 | |

d. | 8.7 x 10 |

## Passage

Velocity at a general point P (x, y) for a horizontal projectile motion is given by

V = =

α is angle made by v with horizontal in clockwise direction Trajectory equation for a horizontal projectile motion is given by x = v _{x} t = ut

y =- ( ) gt ^{2 }

Eliminating t, We get y =-

## Question number: 46 (1 of 3 Based on Passage) Show Passage

» Kinematics » Average Speed and Instantaneous Velocity

### Question

An aeroplane is flying horizontally with a velocity of 720 km/h at an altitude of 490 m. When it is just vertically above the target a bomb is dropped from it. How far horizontally it missed the target?

### Choices

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

a. | 2000 m | |

b. | 200 m | |

c. | 1000 m | |

d. | 100 m |

## Question number: 47 (2 of 3 Based on Passage) Show Passage

» Kinematics » Average Speed and Instantaneous Velocity

### Question

An aeroplane is in a level flying at an speed of 144 km/hr at an altitude of 1000 m. How far horizontally from a given target should a bomb be released from it to hit the target?

### Choices

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

a. | 471.34 m | |

b. | 671.43 m | |

c. | 371.34 m | |

d. | 571.43 m |