Home
Class 11
PHYSICS
A child is swinging a swing. Minimum and...

A child is swinging a swing. Minimum and maximum heights fo swing from the earth's surface are 0.75 m and 2 m respectively. The maximum velocity of this swing is

A

`5ms^(-1)`

B

`10ms^(-1)`

C

`15ms^(-1)`

D

`20ms^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
A
`v=sqrt(2gh)=sqrt(2g(h_(max)-h_(min)))=sqrt(2xx10xx1.25)=5ms^(-1)`
Promotional Banner

Topper's Solved these Questions

  • CIRCULAR MOTION

    DC PANDEY ENGLISH|Exercise Taking it together|67 Videos

  • CIRCULAR MOTION

    DC PANDEY ENGLISH|Exercise Match the columns|3 Videos

  • CIRCULAR MOTION

    DC PANDEY ENGLISH|Exercise Integer|7 Videos

  • CENTRE OF MASS, LINEAR MOMENTUM AND COLLISION

    DC PANDEY ENGLISH|Exercise Level 2 Subjective|21 Videos

  • COMMUNICATION SYSTEM

    DC PANDEY ENGLISH|Exercise Only One Option is Correct|27 Videos

Similar Questions

Explore conceptually related problems

The minimum and maximum distances of a satellite from the centre of the earth are 2R and 4R respectively where R is the radius of earth and M is the mass of the earth find radius of curvature at the point of minimum distance.

The minimum and maximum velocities of a projectile are 10 ms^(-1) and 20 ms^(-1) respectively. The horizontal range and maximum height are respectively (g=10 ms^(-2) )

The minimum and maximum distances of a satellite from the center of the earth are 2R and 4R respectively, where R is the radius of earth and M is the mass of the earth . Find (a) its minimum and maximum speeds, (b) radius of curvature at the point of minimum distance.

A rocket is launched upward from the earth surface whose velocity time graph shown in figure. Then maximum height attained by the rocket is :

Maximum height reached by a rocket fired with a speed equal to 50% of the escape velocity from earth's surface is:

A particle is throws vertically upwards from the surface of earth and it reaches to a maximum height equal to the radius of earth. The radio of the velocity of projection to the escape velocity on the surface of earth is

A mass m is taken to a height R from the surface of the earth and then is given a vertical velocity upsilon . Find the minimum value of upsilon , so that mass never returns to the surface of the earth. (Radius of earth is R and mass of the earth m ).

Find work done in shifting a body of mass m from a height h above the earth's surface to a height 2h above the earth's surface..

The minimum projection velocity of a body from the earth's surface so that it becomes the satellite of the earth (R_(e)=6.4xx10^(6) m) .

A simple pendulum with bob of mass m and conducting wire of length L swings under gravity through an angle 2 theta . The earth's magnetic field component in the direction perpendicular to swing is B . Maximum potential difference induced across the pendulum is

DC PANDEY ENGLISH-CIRCULAR MOTION-Check point
  1. A string of length 0.1 m cannot bear a tension more than 100 N. It is ...

    Text Solution

    |

  2. A mass 2 kg is whirled in a horizontal circle by means of a string at ...

    Text Solution

    |

  3. A mass of 100 gm is tied to one end of a string 2 m long. The body is ...

    Text Solution

    |

  4. A car is taking turn on a circular path of radius R. If the coefficien...

    Text Solution

    |

  5. A car is moving in a circular horizontal track of radius 10 m with a c...

    Text Solution

    |

  6. The radius of the curved road on a national highway is R. The width of...

    Text Solution

    |

  7. A motor cyclist moving with a velocity of 72 km/hour on a flat road ta...

    Text Solution

    |

  8. A car of mass 1000kg negotiates a banked curve of radius 90m on a fric...

    Text Solution

    |

  9. Keeping the angle of banking, if the radius of curvature is made four ...

    Text Solution

    |

  10. A person wants to drive on the vertical surface of a large cylindrical...

    Text Solution

    |

  11. A motercyclist wants to drive on the vertical surface of wooden 'well'...

    Text Solution

    |

  12. A block of mass m at the end of a string is whirled round in a vertica...

    Text Solution

    |

  13. A stone of mass of 1 kg is tied to the end of a string 1 m long. It is...

    Text Solution

    |

  14. A stone is attached to one end of a string and rotated in verticle cri...

    Text Solution

    |

  15. A particle is moving in a vertical circle with constant speed. The tan...

    Text Solution

    |

  16. A particle of mass m is being circulated on a vertical circle of radiu...

    Text Solution

    |

  17. An isolated charge q(1) of mass m is suspended freely by a thread of l...

    Text Solution

    |

  18. A child is swinging a swing. Minimum and maximum heights fo swing from...

    Text Solution

    |

  19. A national roadway bridge over a canal is in the form of an arc of a ...

    Text Solution

    |

  20. A frictionless track ABCDE ends in a circular loop of radius R. A body...

    Text Solution

    |