Home
Class 12
PHYSICS
The power engine which accelerates a car...

The power engine which accelerates a car of mass 800 kg to a speed of 72 km/h from rest in 32s is

A

10 K W

B

15 K W

C

20 K W

D

5 K W

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • WAVES

    MBD PUBLICATION|Exercise QUESTION BANK|295 Videos

Similar Questions

Explore conceptually related problems

A car of mass 750 kg has an engine which produces a constant power of 40 kW. If the resistance to motion assumed constant is 800 N, Find the maximum speed at which the car can travel on the road. Also find the acceleration when it is travelling at 25m/s.

A truck starts from the speed from rest with an acceleration 1.5m/s^2 while a car 150m behind starts from rest with an acceleration of 2m/s^2 . How long will it take before both the truck and car side by side and how much distance is travelled by each ?

A motor car of mass 200 kg is moving with a velocity of 72 km/hr. By the application of brakes it is brought to rest in a distance of 100m. What is the force applied ?

A 50 kg block rests on a rough horizontal surface. A force of 200 N is applied on the body. The block acquires a speed of 4 m//s , starting from rest in 2 seconds. The value of coefficient of friction is

A rocket of initial mass 6000 kg ejects gases at a constant rate of 16 kg/s with constant relative speed of 11 km/s. What is the acceleration of the rocket one minute after the blast.

MBD PUBLICATION-WORK, ENERGY AND POWER-QUESTION BANK
  1. An athlete of mass 60 kg skips at the rate of 20 steps per minute thro...

    Text Solution

    |

  2. A rifle bullet loses 1/20th of its velocity in passing through a plank...

    Text Solution

    |

  3. The power engine which accelerates a car of mass 800 kg to a speed of ...

    Text Solution

    |

  4. A tank of 2xx2xx3 is to be filled with water from a well of average de...

    Text Solution

    |

  5. If the momentum of certain body be increased by 50%, it's K.E. will in...

    Text Solution

    |

  6. A ball is dropped from a height of 20 cm. The ball rebounds to a heigh...

    Text Solution

    |

  7. Two bodies with kinetic energies in the ratio of 4:1 are moving with e...

    Text Solution

    |

  8. A car drives along a straight level frictionless roaid by an engine de...

    Text Solution

    |

  9. A box of mass 25 kg starts from rest and slides down an inclined plane...

    Text Solution

    |

  10. A stone is projected vertically up to reach maximum height h. The rati...

    Text Solution

    |

  11. How many 2.5 kg bricks can a man carry up a staircase 3.6m high in one...

    Text Solution

    |

  12. A vehicle of mass m is moving on a rough horizontal road with momentum...

    Text Solution

    |

  13. A bullet weighing 50 gm leaves the gun with a velocity of 30 m/s.If th...

    Text Solution

    |

  14. A bomb of mass 9 kg explodes into two pieces of mass 3 kg and 6 kg. Th...

    Text Solution

    |

  15. A body of mass 1 kg initially at rest explodes and breaks into three s...

    Text Solution

    |

  16. A mass m moving horizontally with velocity v0 strikes a pendulum of ma...

    Text Solution

    |

  17. A body is allowed to fall on the ground from a height h1. If it is to ...

    Text Solution

    |

  18. A force of 10N is applied on a body for 3 sec and the corresponding di...

    Text Solution

    |

  19. A body of mass 2 kg moving with a velocity of 6 m/s strikes inelastica...

    Text Solution

    |

  20. A Neutron moving with velocity v collides with a stationary alpha part...

    Text Solution

    |