Home
Class 12
PHYSICS
A lorry and a car moving with same K.E. ...

A lorry and a car moving with same K.E. are brought to rest by the application of brakes which provide equal retarding forces. Which of them will come to rest in a shorter distance.

Text Solution

Verified by Experts

Work done by vehicle = loss of K.E. i.e.F.S= loss in K.E. Here K.E. and retarding force f are same. So the distance S travelled by them before coming to rest would also be same.
Promotional Banner

Topper's Solved these Questions

  • WAVES

    MBD PUBLICATION|Exercise QUESTION BANK|295 Videos

Similar Questions

Explore conceptually related problems

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 vehicle of mass 500 kg is moving with a velocity of 15ms −1 . It is brought to rest by a retarding force. Find the distance moved by the vehicle before coming to rest, if the sliding friction between the tyres and the road is 3000N.

A car of mass 1000 kg is moving at 25m/s is brought to rest over a distance of 50 m. Find the breaking force and time required to stop.

A body of mass 10 kg is moving with a velocity of 100 m/s. Find the magnitude of the force required to stop it in 10 seconds. How much distance will it move through before coming to rest ?

A body of mass 10 kg is moving wih a velocity of 100 cm s^-1 . Find the magnitude of force required to stop I in 10 second. How much distance will it move through before coming to rest ?

Two point charges having equal charges separated by 1m distances experience a force of 8N. What will be the force experienced by them , if they are held in water, at the same distance ? ( take , K_(" water" ) = 80 )

A car accelerates from rest at constant rate of 2m/s^2 for some time. Then it retards at constant rate of 4m/s^2 and comes to rest . If the total time for which it remains in motion is 3 seconds, what is the distance travelled ?

Brakes are applied to a train travelling at 72km/h . After passing over 200m it's velocity is reduced to 36 km/h. At the same rate of retardation , how much further will it go before it is brought to rest .

A packet of weight W is dropped with the help of a parachuate and on striking the ground comes to rest with retardation equal twice the acceleration due to gravity. What is the force exerted on the ground

The initial velocity of a car is 10m/s . It accelerates uniformly at 2m/s_2 for 20s and thereafter retards uniformly at 4m/s_2 . Find the total distance covered by the car before it comes to rest . For how much time the car is in motion ?

MBD PUBLICATION-WORK, ENERGY AND POWER-QUESTION BANK
  1. In a tug of war one team is slowly giving way to the other . What work...

    Text Solution

    |

  2. A particle is moving in a circular path of given radius with (i) const...

    Text Solution

    |

  3. A lorry and a car moving with same K.E. are brought to rest by the app...

    Text Solution

    |

  4. Mountain roads rarely go straight up the slope but wind up gradually, ...

    Text Solution

    |

  5. A spring is kept compressed by trying its ends together tightly. It is...

    Text Solution

    |

  6. Can a body have energy without having momentum. Can a body have moment...

    Text Solution

    |

  7. Two protons are brought towards each other. Will the potential energy...

    Text Solution

    |

  8. A light body and a heavy body have, same kinetic energy. Which one wil...

    Text Solution

    |

  9. If energy can neither be created nor destroyed, what happens to the so...

    Text Solution

    |

  10. Will water at the foot of a fall be at different temperature from that...

    Text Solution

    |

  11. Two bodies moving towards each other collide and move away in opposite...

    Text Solution

    |

  12. A meteorite burns in the atmosphere before it reaches earth's surface....

    Text Solution

    |

  13. A man who falls from a height on a cement floor receives more injury t...

    Text Solution

    |

  14. What F.S. represents?

    Text Solution

    |

  15. Is power a vector or scalar quantity.

    Text Solution

    |

  16. If force and displacement are inclined at 90^@, What is the work done

    Text Solution

    |

  17. What is the work done if force and displacement are inclined at 60^@ ...

    Text Solution

    |

  18. By applying brakes to the vehicle it accelerates or retards?

    Text Solution

    |

  19. What work is done if a labourer carries a head load of 10 kg ?

    Text Solution

    |

  20. What is the unit of work in CGS system.

    Text Solution

    |