Home
Class 12
PHYSICS
With what speed should a body be thrown ...

With what speed should a body be thrown upwards so that the distances traversed in 5th second and 6th second are equal?

A

`58.4 m//s`

B

`49 m//s`

C

`sqrt(98) m//s`

D

`98m//s`

Text Solution

Verified by Experts

The correct Answer is:
B
It is only possible when `5^(th)` sec is the last second for its ascending motion and `6^(th)` sec is first second of its dessending motion which is clear from figure.
`therefore 0=u-gt`
so `u=gt=9.8xx5=47 m//sec`
Promotional Banner

Topper's Solved these Questions

  • MOTION IN A PALNE

    ALLEN |Exercise EXERCISE-3|41 Videos

  • MOTION IN A PALNE

    ALLEN |Exercise SOLVED EXAMPLE|28 Videos

  • MOTION IN A PALNE

    ALLEN |Exercise EXERCISE-1|99 Videos

  • KINEMATICS-2D

    ALLEN |Exercise Exercise (O-2)|47 Videos

  • NEWTON'S LAWS OF MOTION & FRICTION

    ALLEN |Exercise EXERCISE (JA)|4 Videos

Similar Questions

Explore conceptually related problems

If a ball is thrown vertically upwards with speed u , the distance covered during the last t second of its ascent is

A body starts from rest, what is the ratio of the distance travelled by the body during the 4th and 3rd s?

What speed should a galaxy move with respect to us so that the sodium line at 589.0 nm is observed at 589.6 nm?

What speed should a galaxy move with respect to us so that the sodium line at 589.0 nm is observed at 589.6 nm ?

What speed should a galaxy move with respect to us so that the sodium line at 589.0 nm is observed at 589.6 nm ?

Initially a body is at rest. If its acceleration is 5ms^(-2) then the distance travelled in the 18^(th) second is :-

Assertion: If a body is dropped from the top of a twoer of height h and another body is thrown up simultaneously with velocity u from the foot of the tower, then both of them would meet after a time (h)/(u) . Reason: For a body projected upwards, the distance covered by the body in the last second of its upwards journey is always 4.9m irrespective of velocity of projection (g=9.8 m//s^(2))

A stone falls freely such that the distance covered by it in the last second of its motion is equal to the distance covered by it in the first 5 seconds. It remained in air for :-

A body is freely dropped from a height h above the ground. Find the ratio of distances fallen in first one second, first two seconds, first three second ,also find the ratio of distances fallen in 1^(st) second, in 2^(nd) second, in 3^(rd) seconds

If a body starts from rest and travels 120 cm in the 6 second then what is the acceleration

ALLEN -MOTION IN A PALNE-EXERCISE-2
  1. The displacement of a particle starting from rest (at t = 0) is given ...

    Text Solution

    |

  2. The x and y coordinates of a particle at any time t are given by x=7t+...

    Text Solution

    |

  3. With what speed should a body be thrown upwards so that the distances ...

    Text Solution

    |

  4. The velocity fo a body depends on time according to equation, v= 2.0 ...

    Text Solution

    |

  5. The displacement of a particle is given by y = a + bt + ct^2 - dt^4. T...

    Text Solution

    |

  6. An athelete completes one round of a circular track of radius R in 40...

    Text Solution

    |

  7. The displacement-time graph of moving particle is shown below The...

    Text Solution

    |

  8. A scooter going due east at 10 ms^(-1) turns right through an angle of...

    Text Solution

    |

  9. A body is imparted motion from rest to move in a straight line. If it ...

    Text Solution

    |

  10. A train covers the first half of the distance between two stations at ...

    Text Solution

    |

  11. A particle is moing with a velocity of 10m//s towards east. After 10s ...

    Text Solution

    |

  12. Which of the following four statements is false

    Text Solution

    |

  13. One car moving on a staright road covers one-third of the distance wit...

    Text Solution

    |

  14. Figure below shows the velocity-time graph of a one dimensional motion...

    Text Solution

    |

  15. If a car at rest, accelerates uniformly to a speed of 144 km//h in 20s...

    Text Solution

    |

  16. A body starts from rest, what is the ratio of the distance travelled b...

    Text Solution

    |

  17. The intial velocity of a particle is u (at t=0) and the acceleration i...

    Text Solution

    |

  18. If a body starts from rest and travels 120 cm in the 6 second then wha...

    Text Solution

    |

  19. If a train travelling at 72 km/h is to be brought to rest in a distanc...

    Text Solution

    |

  20. A car moving with a speed of 40 km//h can be stopped by applying the b...

    Text Solution

    |