Home
Class 12
PHYSICS
If impulse I varies time t as I(kg ms^(-...

If impulse I varies time t as I`(kg ms^(-1))=20t^(2)-40t`.
The change in momentum is minimum at :-

A

`t=2 s`

B

`t=1 s`

C

`t=1/2 s`

D

`t=3/2 s`

Text Solution

Verified by Experts

The correct Answer is:
B
Impulse is defined as rate of change of momentum. For change in momentum to be minimum
`d/(dt)(20 t^(2) -40 t)=0`
`40 t-40=0`
`t=1 s`
Promotional Banner

Topper's Solved these Questions

  • FORCE

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise Exercise 2 (Miscellaneous Problems)|19 Videos

  • FORCE

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise Exercise 2 (Miscellaneous Problems)|19 Videos

  • ELECTROSTATICS

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise MHT CET Corner|29 Videos

  • FRICTION IN SOLID AND LIQUIDS

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise EXERCISE 2 (Miscellaneous Problems)|24 Videos

Similar Questions

Explore conceptually related problems

If displacements of a particle varies with time t as s = 1/t^(2) , then.

A particle moving in a straight line describes a distance xcm from a fixed point on the line at time ts ,where x=t^(5)-40t^(3)+30t^(2)+180t+240. Find when the acceleration is minimum and find the minimum value of acceleration.

Two coils, 1 & 2, have a mutual inductance = M and resistances R each. A current flows in coil 1, which varies with time as: I_(1)=kt^(2) , where K is a constant and 't' is time. Find the totalcharge that has flown through coil 2, between t=0 and t=T.

If velocity v varies with time t as v=2t^(2) , then the plot between v and t^(2) will be given as :

The momentum p (in kg ms^(-1) ) of a particle is varying with time t (in second) as p=2+3 t^(2) . The force acting on the particle at t=3s will be

Displacement of a particle of mass 2 kg varies with time as s=(2t^(2)-2t + 10)m . Find total work done on the particle in a time interval from t=0 to t=2s .

The momentum P ( in kg ms^(-1) ) of a particle is varying with time t ( in second ) as p=2+ 3t^(2) . The force acting on the particle at t=3s will be

The current in a coil varies with respect to time t as I=3t^(2)+2t . If the inductance of coil be 10 mH, the value of induced e.m.f. at t=2s will be-

MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-FORCE-Exercise 1
  1. In the arrangement shown, the mass m will ascend with an acceleration ...

    Text Solution

    |

  2. A block of mass 10 kg is suspended by three strings as shown in the fi...

    Text Solution

    |

  3. If impulse I varies time t as I(kg ms^(-1))=20t^(2)-40t. The change ...

    Text Solution

    |

  4. An initially stationary device lying on a frictionless floor explodes ...

    Text Solution

    |

  5. A bullet of mass 10 g is fired from a gun of mass 1 kg with recoil vel...

    Text Solution

    |

  6. A bullet of mass 0.1 kg is fired with a speed of 100 ms^(-1). The mass...

    Text Solution

    |

  7. A gradener pushes a lawn roller through a distance 20 m. If he applies...

    Text Solution

    |

  8. How much work must work be done by a force on 50 kg body in order to a...

    Text Solution

    |

  9. A force (3 hat(i)+4 hat(j)) acts on a body and displaces it by (3 hat(...

    Text Solution

    |

  10. Force acting on a particale is (2hat(i)+3hat(j))N. Work done by this f...

    Text Solution

    |

  11. A force F = Ay^(2)+By+C acts on a body at rest in the Y-direction. The...

    Text Solution

    |

  12. The force F acting on a particle is moving in a straight line as shown...

    Text Solution

    |

  13. If the force acting on a body is inversely proportional to its speed, ...

    Text Solution

    |

  14. The kinetic energy acquired by a body of mass m in travelling a certai...

    Text Solution

    |

  15. Under the action of a force, a 2 kg body moves such that its position ...

    Text Solution

    |

  16. An object of mass 5 kg is acted upon by a force that varies with posit...

    Text Solution

    |

  17. A block of mass 20 kg is moving in x-direction with a constant speed o...

    Text Solution

    |

  18. In an elastic collison

    Text Solution

    |

  19. If a body of mass m collides head on, elastically with velocity u with...

    Text Solution

    |

  20. Two perfectly elastic particles A and B of equal masses travelling alo...

    Text Solution

    |