Home
Class 11
PHYSICS
A car of mass m is driven with accelerat...

A car of mass `m` is driven with acceleration `a` along a straight level road against a constant external resistive force R. When the velocity of the car V, the rate at which the engine of the car is doing work will be

A

RV

B

maV

C

`(R+ma)V`

D

`(ma-R)V`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • WORK, ENERGY, POWER & COLLISION

    ERRORLESS |Exercise Assertion|30 Videos
  • WORK , ENERGY , POWER AND COLLISION

    ERRORLESS |Exercise Self Evaluation Test|19 Videos

Similar Questions

Explore conceptually related problems

A car of mass 500 kg is driven with acceleration 1 m//s^(2) along straight level road against constant external resistance of 1000 N. When the velocity is 5 m//s the rate at which the engine is working is :

A car is moving along a straight level road with constant speed. Then

A car of mass m is accelerating on a level smooth road under the action of a single F. The power delivered to the car is constant and equal to P. If the velocity of the car at an instant is v, then after travelling how much distance it becomes double? .

The velocity-time graph of a car moving along a straight road is shown in figure. The average velocity of the car is first 25 seconds is

The velocity-time graph of a car moving along a straight road is shown in figure. The average velocity of the car in first 25 seconds is

A car of mass one metric ton travels along a horizontal straight road with its engine working at a constant rate of 20kW. The resistance to motion of the card is 600N. Find the acceleration of the car at an instant, when its speed is 25 m//s

A railroad flatcar of mass M can roll without friction along a straight horizontal track. Initially, a man of mass 'm' is standing on the car, which is at rest. What is the velocity of the car if man runs to the left so that his speed relative to the car is v_(rel) .

ERRORLESS -WORK, ENERGY, POWER & COLLISION-Assertion
  1. A car of mass m is driven with acceleration a along a straight level r...

    Text Solution

    |

  2. Statement-1: A person walking on a horizontal road with a load on his ...

    Text Solution

    |

  3. Assertion : The work done during a round trip is always zero. Reaso...

    Text Solution

    |

  4. Assertion : Work done by friction on a body sliding down an inclined...

    Text Solution

    |

  5. Assertion : When a gas is allowed to expand, work done by gas is pos...

    Text Solution

    |

  6. Assertion: A light body and a heavy body have same momentum. Then they...

    Text Solution

    |

  7. Assertion: The instantaneous power of an agent is measured as the dot...

    Text Solution

    |

  8. Assertion: The change in kinetic energy of a particle is equal to the ...

    Text Solution

    |

  9. Assertion: A spring has potential energy , both when it is compressed ...

    Text Solution

    |

  10. Statement-1:Comets move around the sun in elliptical orbits, the gravi...

    Text Solution

    |

  11. Assertion: Internal forces cannot change linear momentum. Reason: In...

    Text Solution

    |

  12. Assertion : Water at the foot of the water fall is always at differe...

    Text Solution

    |

  13. Assertion : The power of a pump which raises 100 kg of water in 10...

    Text Solution

    |

  14. Assertion: According to law of conservation of mechanical energy chang...

    Text Solution

    |

  15. Assertion : When the force retards the motion of a body, the work do...

    Text Solution

    |

  16. Assertion: In an elastic collision of two bodies , the momentum and en...

    Text Solution

    |

  17. Assertion : A body cannot have energy without possessing momentum but...

    Text Solution

    |

  18. Assertion : Power developed in circular motion is always zero. Reas...

    Text Solution

    |

  19. Assertion : A kinetic energy of a body is quadrupled, when its veloc...

    Text Solution

    |

  20. Assertion: A quick collision between two bodies is more violent that s...

    Text Solution

    |

  21. Assertion : Work done by or against gravitational force in moving a b...

    Text Solution

    |