Home
Class 12
PHYSICS
A boy of mass 30 kg is standing at one e...

A boy of mass 30 kg is standing at one end on a stationary boat over a lake. The boat has a mass 70 kg and length 10 m. Now the boy walked to the other end of the boat. Relative to the ground

A

Boy has moved by a distance `frac{40}{7}` m

B

Boy has moved by a distance `frac{30}{7}` m

C

Boat has moved by a distance 7 m

D

Boat has moved by a distance 3 m

Text Solution

AI Generated Solution

Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

A boy of mass 40 kg is standing at one ned of the boat (mass : 80 kg) of length 6m in a river. Now the boy reaches to other end of the boat. Find the distance moved by the boat and the distance travelled by boy as seen from the bank of river.Assume that the system is at rest and no friction between the boat and the water.

A boy of mass m is standing at one end of a boat of mass M and length l. The boy walks to the other end, the displacement of the

[" 8.A man of mass "30kg" is standing at one end of "],[" stationary floating plank of mass "40kg" .The "],[" length of the plank is "7m" .If man moves to other "],[" end of the plank,then the distance by which "],[" plank will move,is (Assume no friction between "],[" water and plank) "]

A boy of mass 50kg is standing at one end of a boat of length 9m and mass 400kg . He runs to the other end. The distance through which the centre of mass of the boat boy system moves is

A boy (mass of 40 kg) is standing at one end of a boat (mass of 60 kg) in still water. The length of the boat is 10 m and the boy takes 2s to reach at other end of boat moving with constant speed. Assuming no friction between the boat and the water. (i) The distance covered by the boat is 4 m (ii) The distance covered by the boy with respect to the ground is 6 m . (iii) The velocity of the boy with respect to the ground is lt 5 m//s (iv) The velocity of the boy is 3 m//s

A boy having a mass of 40kg stands at one end A of a boat of length 2m at rest. The boy walks to the other end B of the boat and stops. What is the distance moved by the boat? Friciton exists between the feet of the boy and the surface of the boat. But the friction between the boat and the water surface may be neglected. Mass of the boat is 15kg .

A boat of length 10m and mass 450kg is floating without motion in still water. A man of mass 50kg standing at one end of it walks to the other end of it and stops. The magnitude of the displacement of the boat in metres relative to ground is

A man of mass M stands at one end of a stationary plank of length L, lying on a smooth surface. The man walks to the other end of the plank. If the mass of the plank is M//3 , the distance that the man moves relative to the ground is

No external force: Stationery mass relative to an inertial frame remains at rest A man of mass m is standing at one end of of a plank of mass M. The length of the plank is L and it rests on a frictionless horizontal ground. The man walks to the other end of the plank. Find displacement of the plank and man relative to the ground.

AAKASH INSTITUTE-TEST 4-EXAMPLE
  1. The moment of inertia of a uniform square plate of mass M and edge len...

    Text Solution

    |

  2. A cycle tyre of mass M and radius R is in pure rolling over a horizont...

    Text Solution

    |

  3. A boy of mass 30 kg is standing at one end on a stationary boat over a...

    Text Solution

    |

  4. A uniform plank is supported by two equal 120 N forces at x and y as s...

    Text Solution

    |

  5. A thin uniform wire of mass m and length l is bent into to shape of a ...

    Text Solution

    |

  6. A ring rolls down an inclined plane and acquires a velocity v upon rea...

    Text Solution

    |

  7. A thin ring of mass m and radius R is in pure rolling over a horizonta...

    Text Solution

    |

  8. A ring is rolling without slipping. The ratio of translational kinetic...

    Text Solution

    |

  9. The moment of inertia of a cube of mass M and edge length a about an a...

    Text Solution

    |

  10. The moment of inertia of a solid sphere of radius R about an axis pass...

    Text Solution

    |

  11. A hollow sphere rolls down a rough inclined plane whose angle of incli...

    Text Solution

    |

  12. A body of mass m is projected with a velocity u at an angle theta with...

    Text Solution

    |

  13. A particle of mass 300 g is moving with a speed of 20 ms^-1 along the ...

    Text Solution

    |

  14. A cubical block of edge length 1 m and density 800 kg m^-3 rests on a ...

    Text Solution

    |

  15. A body is thrown from ground for horizontal range 100 m. If the body b...

    Text Solution

    |

  16. A body is in pure rolling over a horizontal surface. If the rotational...

    Text Solution

    |

  17. A particle is rotating about a fixed axis with angular acceleration ve...

    Text Solution

    |

  18. Two discs A and B have same mass and same thickness. If d1 and d2 are ...

    Text Solution

    |

  19. The rotational inertia of a disc about its axis is 0.70 kg m^2. When a...

    Text Solution

    |

  20. A force vecF = (hati+hatj-hatk)N acts at a point P(3 m, 6 m, 9 m). The...

    Text Solution

    |