Home
Class 11
PHYSICS
A force exerts an impulse Ion a particle...

A force exerts an impulse Ion a particle changing its speed from initial velocity `u` to final velocity `2u`. The applied force and the initial velocity are oppositely oriented along the same line. The work done by the force is

A

`3/2Iu`

B

`1/2Iu`

C

`Iu`

D

`2Iu`

Text Solution

Verified by Experts

The correct Answer is:
B
`I=m[2u-(-u)=3"mu"`
`W=1/2m[(2u)^(2)-u^(2)]=(3"mu"^(2))/2=(Iu)/2`
Promotional Banner

Topper's Solved these Questions

  • CENTRE OF MASS

    CENGAGE PHYSICS|Exercise Multiple Correct|25 Videos

  • CENTRE OF MASS

    CENGAGE PHYSICS|Exercise Assertion - Reasoning|2 Videos

  • CENTRE OF MASS

    CENGAGE PHYSICS|Exercise Subjective|23 Videos

  • CALORIMETRY

    CENGAGE PHYSICS|Exercise Solved Example|13 Videos

  • DIMENSIONS & MEASUREMENT

    CENGAGE PHYSICS|Exercise Integer|2 Videos

Similar Questions

Explore conceptually related problems

A force exerts an impulse I on a particle changing its speed from u to 2u. The applied force and the initial velocity are oppositely directed along the same line. The work done by the force is

A force exerts an impulse J on a body changing its speed from u to upsilon . The force and object's motion are along the same line. Show that the work done by the force is J(u+upsilon)//2

A projectile fired with initial velocity u at some angle theta has a range R . If the initial velocity be doubled at the same angle of projection, then the range will be

Certain force acting on a 20 kg mass changes its velocity from 5m//s to 2m//s . calculate the work done by the force.

If a particle with a = kv^(2) and initial velocity is u then velocity after S displacement. Here k is a constant

A body starting with a velocity v returns to its initial position after t second with the same speed, along the same line. Acceleration of the particle is

Statement - 1: A particle moves along a straight line with constant velocity. Now a constant non-zero force is applied on the particle in direction opposite to its initial velocity. After the force is applied, the net work done by this force may be zero in certain time intervals. Statement - 2 : The work done by a force acting on a particle is zero in any time interval if the force is always perpendicular to velocity of the particle.

From a point on the ground a particle is projected with initial velocity u ,such that its horizontal range is maximum. The magnitude of average velocity during its ascent.

A particle has initial A particle has initial velocity 10m//s . It moves due to constant retarding force along the line of velocity which produces a retardation of 5 m//s^(2) . Then

Certain force acting on a 20 kg mass changes its velocity from 5ms ^-1 to 2ms^-1 . Calculate the work done by the force.

CENGAGE PHYSICS-CENTRE OF MASS-Single Correct
  1. Two blocks of masses m(1)= 2 kg and m(2) = 4 kg are moving in the same...

    Text Solution

    |

  2. A cracker is thrown into air with a velocity of 10 m//s at an angle of...

    Text Solution

    |

  3. A force exerts an impulse Ion a particle changing its speed from initi...

    Text Solution

    |

  4. A ball falls vertically onto a floor with momentum p and then bounces ...

    Text Solution

    |

  5. A ball released from a height ho above a horizontal surface rebounds t...

    Text Solution

    |

  6. Two identical balls, of equal masses A and B, are lying on a smooth su...

    Text Solution

    |

  7. A particle of mass in is made to move with uniform speed v0 along the ...

    Text Solution

    |

  8. A continuous stream of particles, of mass m and velocity r, is emitted...

    Text Solution

    |

  9. A ball kept in a close box moves in the box making collisions with the...

    Text Solution

    |

  10. A particle of mass m moving with a velocity u makes an elastic one-dim...

    Text Solution

    |

  11. A stationary body explodes into two fragments of masses m(1) and m(2)....

    Text Solution

    |

  12. A ball of mass m is projected with a speed v into the barrel of a spri...

    Text Solution

    |

  13. A railway flat car has an artillery gun installed on it. The combined ...

    Text Solution

    |

  14. Two blocks of masses 6 kg and 4 kg are attached to the two ends of a m...

    Text Solution

    |

  15. The momentum of a moving particle is vectorially given a, vecp=p(0)(co...

    Text Solution

    |

  16. A gun of mass M. fires a shell of mass m horizontally and the energy o...

    Text Solution

    |

  17. An inverted T-shaped object is placed on a horizontal floor as shown i...

    Text Solution

    |

  18. Two blocks m(1) and m(2) are pulled on a smooth horizontal surface, an...

    Text Solution

    |

  19. A particle at rest is constrained to move on a smooth horizontal surfa...

    Text Solution

    |

  20. A particle of mass m comes down on a smooth inclined plane from point ...

    Text Solution

    |