Home
Class 11
PHYSICS
Two trains A and B are approaching each ...

Two trains A and B are approaching each other on a straight track, the former with a uniform velocity of 25 m/s and other with 15m/s, when they are 225 m a part brakes are simultaneously applied to both of them. The deceleration given by the brakes to thetrain B increases linearly with time by `0.3 m//s^(2)` every second, while the train A is given a uniform deceleration, (a) What must be the minimum deceleration of the train A so that the trains do not collide ? (b) What is the time taken by the trains to come to stop ?

A

`5m//s^(2)`

B

`2.5m//s^(2)`

C

`1.5m//s^(2)`

D

`7.5m//s^(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • KINEMATICS 1

    DC PANDEY|Exercise MATCH THE COLUMN|10 Videos

  • KINEMATICS 1

    DC PANDEY|Exercise INTEGER_TYPE|15 Videos

  • KINEMATICS 1

    DC PANDEY|Exercise MCQ_TYPE|27 Videos

  • KINEMATICS

    DC PANDEY|Exercise INTEGER_TYPE|11 Videos

  • LAWS OF MOTION

    DC PANDEY|Exercise Medical entrances gallery|39 Videos

Similar Questions

Explore conceptually related problems

two particles A and B are at separation of 100 m . They move towards each other with uniform speed, A with 5 m//s and B with 15 m//s . When and where the two particle meet?

Two particles are 100 m apart and start approaching each other with constant velocities of 2 m//s and 3 m//s . The particles will meet after.

Two identical balls are approaching towards each other on a straight line with velocity 2m//s and 4m//s , respectiely. Find the final velocities after elastic collision between them.

Two trains A and B are moving on same track in opposite direction with velocity 25m/s and 15,m/s" respectively.When separation between them becomes 225m drivers of both the trains apply brakes producing uniform retardation in train A while retardation of train B increases linearly with time at the rate of 0.3m/s^(3).The minimum retardation of train A to avoid collision will be

Two trans one t ravelling at 54 kmph and the other at 72 kmph are headed towards one another along a straingt track. When they are 1//2 km apart, both drivers simultaneously seee the other train and apply their brakes. If each train is decelerated at the rate of 1 m//s^(2) , will there be a collision ?

two cars approach each other on a straight road. Car A moves at 16 m//s and car B moves at 8m//s. When they are 45 m apart both drivers apply their brakes. Car A slows down at . 2 m//s^(2) . While car B slows down at 4 m//s^(2) . Where and when do they collide?

A motor car moving with a uniform speed of 20 m/sec comes to stop on the application of brakes after travelling a distance of 10m, its deceleration is

DC PANDEY-KINEMATICS 1-COMPREHENSION_TYPE
  1. A particle starts from rest with a time varying acceleration a=(2t-4)....

    Text Solution

    |

  2. A particle starts from rest with a time varying acceleration a=(2t-4)....

    Text Solution

    |

  3. A particle starts from rest with a time varying acceleration a=(2t-4)....

    Text Solution

    |

  4. x and y co-ordinates of a particle moving in x-y plane at some instant...

    Text Solution

    |

  5. x and y co-ordinates of a particle moving in x-y plane at some instant...

    Text Solution

    |

  6. At time t=0, particle A is at (1m,2m) and B is at (5m,5m). Velociyt of...

    Text Solution

    |

  7. At time t=0, particle A is at (1m,2m) and B is at (5m,5m). Velocity of...

    Text Solution

    |

  8. The position of a particle is given by x=2(t-t^(2)) where t is exp...

    Text Solution

    |

  9. The position of a particle is given by x=2(t-t^(2)) where t is exp...

    Text Solution

    |

  10. The position of a particle is given by x=2(t-t^(2)) where t is exp...

    Text Solution

    |

  11. The position of a particle is given by x=2(t-t^(2)) where t is exp...

    Text Solution

    |

  12. The position of a particle is given by x=2(t-t^(2)) where t is exp...

    Text Solution

    |

  13. The position of a particle is given by x=2(t-t^(2)) where t is exp...

    Text Solution

    |

  14. The graph given shows the positions of two cars, A and B, as a functio...

    Text Solution

    |

  15. The graph given show the position of two cars A and B as a function of...

    Text Solution

    |

  16. The graph given shows the positions of two cars, A and B, as a functio...

    Text Solution

    |

  17. The graph given show the position of two cars A and B as a function of...

    Text Solution

    |

  18. Two trains A and B are approaching each other on a straight track, the...

    Text Solution

    |

  19. Two trains A and B are approaching each other on a straight track, the...

    Text Solution

    |