Home
Class 11
PHYSICS
Bullets are fired at regular intervals o...

Bullets are fired at regular intervals of 10 second from a car moving with a speed of `30 ms^(-1)` towards another car approaching with a speed of `60 ms^-1`. The interval at which the bullet firing can be reported is

A

7.7 second

B

8.32 second

C

6.7 second

D

12 second

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • VECTOR-I AND VECTOR-II

    PATHFINDER|Exercise QUESTION BANK|187 Videos

  • WORK POWER AND ENERGY

    PATHFINDER|Exercise QUESTION BANK|34 Videos

Similar Questions

Explore conceptually related problems

A car is moving at 24 km *h^(-1) towards east and another car is moving north at 18 km *h^(-1) . Find the relative velocity of the second car with respect to the first.

A car moves with a speed of 30 "km.h"^(-1) in half of the total time taken and with 40 "km.h"^(-1) rest of the time, What is the average speed of the body?

Two railway tracks are paraller to west-east direction . Along one track train A moves with a speed of 30 m*s^(-1) from west to east, while along the second track, train B moves with a speed of 48 m*s^(-1) from east to west . The relative speed of B with respect to A is

A 5kg rifle fires a 5g bullet with a speed of 500 m*s^(-1) . What kinetic energy is acquired (i) by the bullet and

PATHFINDER-WAVE MOTION AND SOUND -I & II-QUESTION BANK
  1. A sound source of frequency 500 Hz is producing longitudinal waves in ...

    Text Solution

    |

  2. A bullet is fired in a valley between two parallel mountains. The firs...

    Text Solution

    |

  3. Bullets are fired at regular intervals of 10 second from a car moving ...

    Text Solution

    |

  4. Volumetric strain in a longitudinal wave is

    Text Solution

    |

  5. A speeding motorcyclist is crossing a policeman at rest. The frequency...

    Text Solution

    |

  6. An open pipe is suddenly closed at one end, as a result of which the f...

    Text Solution

    |

  7. Two wires A and B having identical dimensions, are stretched from thei...

    Text Solution

    |

  8. The power of sound from the speaker of a radio is 20 milliwatt. But tu...

    Text Solution

    |

  9. A string 25 cm long having a mass of 2.5 g. is under tension. A pipe c...

    Text Solution

    |

  10. The linear density of a string is 2xx10^(-2) kg/m. A transverse wave i...

    Text Solution

    |

  11. Ab is a cylinder of length 1 m Fitted with a thin flexible diaphragm ...

    Text Solution

    |

  12. A column of air at 80^@C and a tuning fork produce 4 beat/sec when sou...

    Text Solution

    |

  13. A wave y1 ai "sin"omega(x/c1 -t) reaches the boundary of media 1 and 2...

    Text Solution

    |

  14. In the above question , if the slope of displacement wae at the bounda...

    Text Solution

    |

  15. A bat flies towards a wall with a speed of 6 m/s emitting an ultrasoni...

    Text Solution

    |

  16. A train approaching a hill with a speed of 40 km/h sounds a whistle of...

    Text Solution

    |

  17. A source of sound is moving along a circular orbit of radius 3m with a...

    Text Solution

    |

  18. A racing can moving towards a cliff sound its horn. The driver observe...

    Text Solution

    |

  19. In a resonance -column experiment, a long tube, open at the top , is c...

    Text Solution

    |

  20. A sound wave travelling with velocity v in medium A reaches a point on...

    Text Solution

    |