Home
Class 11
PHYSICS
Assertion: Two blocks A and B are connec...

Assertion: Two blocks A and B are connected at the two ends of an ideal spring as shwon in figure. Initially, spring was released. Now block B is pressed. Linear momentum of the system will not remain constan till the spring reaches its initial natural length.

Reason: An external force will act from the wall on block A.

A

If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

B

If both Assertion and Reason are correct but Reason is not the correct explanation of Assertion.

C

If Assertion is true but Reason is false.

D

If Assertion is false but Reason is true.

Text Solution

Verified by Experts

The correct Answer is:
A

Linear momentum will not remain constant till spring will remain compressed. Therefore a force will act on block A from the wall.
Promotional Banner

Topper's Solved these Questions

  • CENTRE OF MASS

    DC PANDEY ENGLISH|Exercise Match the coloumns|9 Videos
  • CENTRE OF MASS

    DC PANDEY ENGLISH|Exercise Medical entrances gallery|27 Videos
  • CENTRE OF MASS

    DC PANDEY ENGLISH|Exercise Taking it together|73 Videos
  • CALORIMETRY AND HEAT TRANSFER

    DC PANDEY ENGLISH|Exercise Medical entrance s gallery|38 Videos
  • CENTRE OF MASS, IMPULSE AND MOMENTUM

    DC PANDEY ENGLISH|Exercise Comprehension type questions|15 Videos

Similar Questions

Explore conceptually related problems

Two masses m and 2m are attached to two ends of an ideal spring as shown in figure. When the spring is in the compressed state, the energy of the spring is 60 J, if the spring is released, then at its natural length

Find the maximum tension in the spring if initially spring at its natural length when block is released from rest.

A block of mass m is attached with a spring in vertical plane as shown in the figure. If initially spring is in its natural length and the block is released from rest, then maximum extension in the spring will be

Two blocks having masses 8kg and 16kg are connected to the two ends of a light spring. The system is placed on a smooth horizontal floor. An inextensible string also connects B with ceiling as shown in the figure at the final moment. Initially the spring has its natural length. A constant horizontal force F is applied to the heavier block as shown. What is the maximum possible value of F so the lighter block doesn't loose contact with ground?

In the situations shown in the figure surfaces are frictionless. Find the maximum extension of the springs if blocks are initially at rest and springs are initially in natural lengths.

Two blocks of masses m_(1) and m_(2) are connected by a massless spring and placed on smooth surface. The spring initially stretched and released. Then :

Two blocks A and B of masses in and 2m , respectively, are connected with the help of a spring having spring constant, k as shown in Fig. Initially, both the blocks arc moving with same velocity v on a smooth horizontal plane with the spring in its natural length. During their course of motion, block B makes an inelastic collision with block C of mass m which is initially at rest. The coefficient of restitution for the collision is 1//2 . The maximum compression in the spring is

According to the principle of conservation of linear momentum if the external force acting on the system is zero, the linear momentum of the system will remain conserved. It means if the centre of mass of a system is initially at rest, it will remain at rest in the absence of external force, that is, the displacement of centre of mass will be zero. A plank of mass M is placed on a smooth horizontal surface. light identical springs, each of stiffness K , are rigidly connected to struts at the end of the plank as shown in Fig. When the springs are in their unextended position, the distance between their free ends is 3l . A block of mass m is placed on the plank and pressed against one of the springs so that it is compressed to l . To keep the block at rest it is connected to the strut means of a light string. Initially, the system is at rest, Now the string is burnt. The maximum kinetic energy of the block m is

According to the principle of conservation of linear momentum, if the external force acting on the system is zero, the linear momentum of the system will remain conserved. It means if the centre of mass of a system is initially at rest, it will remain, at rest in the absence of external force, that is, the displacement of centre of mass will be zero. Two blocks of masses 'm' and '2m' are placed as shown in Fig. There is no friction anywhere. A spring of force constant k is attached to the bigger block. Mass 'm' is kept in touch with the spring but not attached to it. 'A' and 'B' are two supports attached to '2m' . Now m is moved towards left so that spring is compressed by distance 'x' and then the system is released from rest. Find the relative velocity of the blocks after 'm' leaves contact with the spring.

Block A is hanging from a vertical spring and is at rest. Block B strikes the block A with velocity v and sticks to it. Then the value of v for which the spring just attains natural length is

DC PANDEY ENGLISH-CENTRE OF MASS-Assertion and reason
  1. These questions consists of two statements each printed as Assertion a...

    Text Solution

    |

  2. Assertion: A given force applied in turn to a number of different mass...

    Text Solution

    |

  3. Assertion: In inelastic collision, linear momentum of system does not ...

    Text Solution

    |

  4. Assertion: Two spherical bodies of mass ratio 1:2 travel towards each ...

    Text Solution

    |

  5. Assertion: Center of mass and center of gravity of a body will coincid...

    Text Solution

    |

  6. Assertion: A projectile gets exploded at its highest point. All the pi...

    Text Solution

    |

  7. Assertion: If a projectile explodes in mid air, linear momentum of cen...

    Text Solution

    |

  8. Assertion: When a body dropped from a height explodes in mid air, its ...

    Text Solution

    |

  9. Assertion: The centre mass of an electron and proton, when released mo...

    Text Solution

    |

  10. Assertion: The relative velocity of the two particles in head-on elast...

    Text Solution

    |

  11. Assertion: If net force on a system is zero, then momentum of every in...

    Text Solution

    |

  12. Assertion: If a projectile explodes in mid air, linear momentum of cen...

    Text Solution

    |

  13. Assertion: Two bodies moving in opposite directions with same magnitud...

    Text Solution

    |

  14. Assertion: A body is thrown with a velocity u inclined to the horizont...

    Text Solution

    |

  15. Assertion : A moving ball having an inelastic collison withh another m...

    Text Solution

    |

  16. Assertion: A rocket launched vertically upward explodes at the highest...

    Text Solution

    |

  17. Assertion: Two blocks A and B are connected at the two ends of an idea...

    Text Solution

    |

  18. Assertion: In the figure shown, linear momentum of system (of blocks A...

    Text Solution

    |

  19. Assertion: Two blocks of masses m(A) and m(B) (gtm(A) are thrown towar...

    Text Solution

    |

  20. Assertion: Two identical spherical spheres are half filled with two l...

    Text Solution

    |