Home
Class 11
PHYSICS
The length of the seconds hand a watch i...

The length of the seconds hand a watch is 10mm. What is the change in the angular speed of the watch after 15 seconds ?

A

zero

B

`((10pi)/2) mms^(-1)`

C

`(20/pi) mms^(-1)`

D

`10sqrt2 mms^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • CALORIMETRY, THERMAL EXPANSION; HEAT TRANSFER

    PATHFINDER|Exercise QUESTION BANK|228 Videos

  • ELASTICITY

    PATHFINDER|Exercise QUESTION BANK|139 Videos

Similar Questions

Explore conceptually related problems

The length of second 's hand of a watch is 1 cm , what is the change in velocity of its tip in 15 seconds ?

The angular velocity of the hour hand of a watch is:

What is the angular velocity of the second hand of a clock?

For a wire of length l, maximum change in length under stress condition is 2mm. What is the change in length (in mm) under same condition when length of wire is halved?

A circular disc is rotating about its natural axis with angular velocity of 10 rad/s . A second disc of same mass is joined to it coaxially. If the radius of the second disc is half of the first one, then what is the angular velocity if they rotate together ?

When a body of mass 5kg is hung from a wire of length 1 m and radius 2mm,the length increases by 0.1 mm, IF the poisson's ratio is 0.4 , what will be the change in the radius of the wire? If the load is reduced to 2kg,how will the radius change?

What will be the effective length of a seconds pendulum on the surface of the moon? The mass and the diameter of the earth are 80 times and 4 times the mass and the diameter respectively of the moon.

PATHFINDER-CIRCULAR MOTION-QUESTION BANK
  1. A particle moves along a circular path of radius r with uniform speed ...

    Text Solution

    |

  2. A wheel is subjected to uniform angular acceleration about its axis.In...

    Text Solution

    |

  3. The length of the seconds hand a watch is 10mm. What is the change in ...

    Text Solution

    |

  4. The angular velocity of a flywheel changes with time as omega =a-bt, w...

    Text Solution

    |

  5. Two racing cars of masses m1 and m2 are moving in circle of radii r1 a...

    Text Solution

    |

  6. A wheel is at rest, its angular velocity increases uniformly and becom...

    Text Solution

    |

  7. A particle moves along a circle of radius (20/pi) m with constant tang...

    Text Solution

    |

  8. When a particle moves in a circle with uniform speed

    Text Solution

    |

  9. The second's hand of a watch has length 6 cm. Speed of end point and m...

    Text Solution

    |

  10. Two particles P and Q are located ar distance rp and rq respectively f...

    Text Solution

    |

  11. Let a1 and a2 represent radial and tangential acceleration. The motion...

    Text Solution

    |

  12. In uniform circular motion, the quantity that remains constant is

    Text Solution

    |

  13. Which of the following statements is false for a particle moving in a ...

    Text Solution

    |

  14. If a particle moves in a circle describing equal angles in equal times...

    Text Solution

    |

  15. A body moves with constant angular velocity on a circle. magnitude of ...

    Text Solution

    |

  16. Cream gets separated out of milk when it is churned, it is due to

    Text Solution

    |

  17. A particle is kept fixed on a turntable rotating uniformly. As seen fr...

    Text Solution

    |

  18. A particle moves with deceleration along the circle of radius R so tha...

    Text Solution

    |

  19. A body is moving along the circumference of a circle of radius 'R' in ...

    Text Solution

    |

  20. A body completes one round of a circle of radius R in 20 second. The d...

    Text Solution

    |