Home
Class 12
PHYSICS
A child is standing at one end of a long...

A child is standing at one end of a long trolley moving with a speed v on a smooth horizontal track. If the child starts running towards the other end of the trolley with a speed u, the centre of mass of the system (trolley + child) will move with a speed :

A

Zero

B

`(v+u)`

C

`v`

D

`(v-u)`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • SYSTEM OF PARTICLES AND ROTATIONAL MOTION

    AAKASH INSTITUTE|Exercise Assignment (Section - B) Objective Type Questions (One option is correct)|57 Videos

  • SYSTEM OF PARTICLES AND ROTATIONAL MOTION

    AAKASH INSTITUTE|Exercise Assignment (Section - C) Objective Type Questions (More than one option are correct)|28 Videos

  • SYSTEM OF PARTICLES AND ROTATIONAL MOTION

    AAKASH INSTITUTE|Exercise Illustration|4 Videos

  • SEMICONDUCTOR ELECTRONICS: MATERIALS, DEVICES AND SIMPLE CIRCUITS

    AAKASH INSTITUTE|Exercise Assignment (Section-D (Assertion and reason))|5 Videos

  • TEST 1

    AAKASH INSTITUTE|Exercise EXERCISE|9 Videos

Similar Questions

Explore conceptually related problems

A child is sitting at one end of a long trolley moving with a uniform speed v on a smooth horizontal track. If the child starts running towards the other end of the trolley with a speed u (w.r.t. trolley), the speed of the centre of mass of the system will.

The figure shows a man of mass m standing at the end A of a trolley of maas M placed at rest on a smooth horizontal surface. The man starts moving towards the end B with a velocity u_(rel) with respect to the trolley. The length of the trolley is L. When the man reaches the end B, the distance moves . by the trolley with respect to ground is:

The figure shows a man of mass m standing at the end A of a trolley of maas M placed at rest on a smooth horizontal surface. The man starts moving towards the end B with a velocity u_(rel) with respect to the trolley. The length of the trolley is L. The velocity of the man with respect to ground v_(1) will be:

A man of mass m is standing at one end of a trolley of mass M and length L placed at rest on a smooth horizontal surface. The man starts moving towards the other end and covers distance L, then distance moved by man w.r.t ground is

The figure shows a man of mass m standing at the end A of a trolley of maas M placed at rest on a smooth horizontal surface. The man starts moving towards the end B with a velocity u_(rel) with respect to the trolley. The length of the trolley is L. As the man walks on the trolley, the centre of mass of the system (man+ trolley) :

The figure shows a man of mass m standing at the end A of a trolley of maas M placed at rest on a smooth horizontal surface. The man starts moving towards the end B with a velocity u_(rel) with respect to the trolley. The length of the trolley is L. The time taken by the man to reach the other end is:

The figure shows a man of mass m standing at the end A of a trolley of maas M placed at rest on a smooth horizontal surface. The man starts moving towards the end B with a velocity u_(rel) with respect to the trolley. The length of the trolley is L. Choose the correct statement:

The figure shows a man of mass m standing at the end A of a trolley of maas M placed at rest on a smooth horizontal surface. The man starts moving towards the end B with a velocity u_(rel) with respect to the trolley. The length of the trolley is L. When the man starts moving, then the velocity of the trolley v_(2) with respect to ground will be:

AAKASH INSTITUTE-SYSTEM OF PARTICLES AND ROTATIONAL MOTION-Assignment (Section - A) Objective Type Questions (One option is correct)
  1. Locate the centre of mass of arrangement shown in figure. The three ro...

    Text Solution

    |

  2. A particle of mass m is thrown horizontally from the top of a tower an...

    Text Solution

    |

  3. A child is standing at one end of a long trolley moving with a speed v...

    Text Solution

    |

  4. A man of mass m moves on a plank of mass M with a constant velocity u...

    Text Solution

    |

  5. Two blocks of masses 5kg and 2kg are connected by a spring of negligib...

    Text Solution

    |

  6. A body falling vertically downwards under gravity breaks in two parts ...

    Text Solution

    |

  7. A body at rest breaks into two pieces of equal masses. The parts will ...

    Text Solution

    |

  8. Let I(A) and I(B) be moments of inertia of a body about two axes A and...

    Text Solution

    |

  9. The moment of inertia of a cylinder of mass 1000gm and radius 20cm abo...

    Text Solution

    |

  10. The angular momentum changes from 4 unit to 10 unit in 2 seconds. The ...

    Text Solution

    |

  11. A constant torque of 400Nm turns a wheel of moment of inertia 100kg m^...

    Text Solution

    |

  12. The masses of two uniform discs are in the ratio 2 : 1 and their radii...

    Text Solution

    |

  13. If the torque acting on a system is zero then, which of the followin q...

    Text Solution

    |

  14. The moment of inertia of a thin uniform rod about an axis passing thro...

    Text Solution

    |

  15. A rigid body of moment of inertia l has an angular acceleration alpha....

    Text Solution

    |

  16. A flywheel rotates about a fixed axis and slows down from 300 r.p.m to...

    Text Solution

    |

  17. A body starting from rest gains an angular speed of 540 r.p.m in 6 sec...

    Text Solution

    |

  18. A ring of mass 6kg and radius 40cm is revolving at the rate of 300 rpm...

    Text Solution

    |

  19. A ring of mass 10kg and diameter 0.4m is rotated about an axis passing...

    Text Solution

    |

  20. If radius of the earth contracts to half of its present value without ...

    Text Solution

    |