Home
Class 12
PHYSICS
Statement - 1 : Sum of work done by the ...

Statement - 1 : Sum of work done by the Newton’s 3rd law pair internal forces, acting between two particles may be zero. Statement -
2 : If two particles undergo same displacement then work done by Newton’s 3rd law pair forces on them is of opposite sign and equal magnitude.

A

Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-1.

B

Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1.

C

Statement -1 is False, Statement-2 is True.

D

Statement -1 is True, Statement-2 is False.

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

Statement -1: The work done by all forces on a system equals to the change in kinetic energy of that system . This statement is true even if nonconservative forces act on the system. Statement -2: The total work done by internal forces may be positive.

Statement-1: Two particles acted by same net force for same time always have same kinetic energy Statement-2: Two particles acted by same net force having same displacement always have same kinetic energy.

Statement-1: Two particles acted by same net force for same time always have same change in kinetic energy. Statement-2: Two particles acted by same net force having same displacement always have same change in kinetic energy.

Statement-1: Non zero work has to be done on a moving particle to change its momentum. Statement-2 : To change momentum of a particle a non zero net force should act on it.

STATEMENT-1 : Acceleration of a particle in a reference frame may be non- zero , even if net external force acting on the particle is zero. and STATEMENT : 2 In a non- - inertial reference frame, Newton's second law is not valid.

STATEMENT-1: Work done by the net force acting on a particle is equal to the change in its kinetic energy. STATEMENT-2: Change in potential energy is always equal to the work done by external forces. STATEMENT-3: Work energy theorem is not applicable, if the work is done by the non-conservative forces

Statement - I : Assuming zero potential at infinity, gravitational potential at a point cannot be positive. Statement - 2 : Magnitude of gravitational force between two particle has inverse square dependence on distance between two particles.

A time dependent force F=3t^(2)+6t acts on a particle of mass 18kg .If particle starts from rest the work done by the force during the first 3 second will be :

A force f =10 + 2 x acts on a particle moving in straight line on x axis the work done by this force during a displacement from x =0 and x =3m

DISHA-WORK, ENERGY AND POWER-physics
  1. In the figure shown, the system is released from rest with both the sp...

    Text Solution

    |

  2. As shown in the figure, a uniform sphere is rolling on a horizontal su...

    Text Solution

    |

  3. Statement - 1 : Sum of work done by the Newton’s 3rd law pair internal...

    Text Solution

    |

  4. Statement - 1: A particle moves along a straight line with constant ve...

    Text Solution

    |

  5. A rifle man, who together with his rifle has a mass of 100 kg, stands ...

    Text Solution

    |

  6. A bullet of mass 10 g travelling horizontally with a velocity of 300 m...

    Text Solution

    |

  7. A 20 g bullet pierces through a plate of mass M(1) = 1 kg and then com...

    Text Solution

    |

  8. A bullet of mass 20 g hits a block of mass 1.98 kg suspended from a ma...

    Text Solution

    |

  9. A bullet of mass 0.01 kg travelling at a speed of 500 m/s strikes a bl...

    Text Solution

    |

  10. The rate of burning of fuel in a rocket is 50 gm/sec. and comes out wi...

    Text Solution

    |

  11. A body of mass 1 kg strikes elastically with another body at rest and ...

    Text Solution

    |

  12. A ball moving with a speed of 9m//s strikes an identical ball at rest,...

    Text Solution

    |

  13. The mass of a rocket is 500 kg and the relative velocity of the gases ...

    Text Solution

    |

  14. A slow moving electron collides elastically with a hydrogen atom at re...

    Text Solution

    |

  15. A particle of mass 4 m which is at rest explodes into three fragments....

    Text Solution

    |

  16. A body of mass M splits into two parts aM and (1-alpha) M by an intern...

    Text Solution

    |

  17. A body of mass 1 kg, initially at rest, explodes and breaks into three...

    Text Solution

    |

  18. A body of mass m moving with a velocity v in the x direction collides ...

    Text Solution

    |

  19. A ball of a mass m hits the floor with as speed v making an angle of i...

    Text Solution

    |

  20. A tennis ball dropped from a height of 2 m rebounds only 1.5 metre aft...

    Text Solution

    |