Home
Class 12
PHYSICS
If a car at rest, accelerates uniformly ...

If a car at rest, accelerates uniformly to a speed of `144 km//h` in `20s`, it covers a distance of

A

20m

B

400m

C

1440m

D

2980m

Text Solution

Verified by Experts

The correct Answer is:
B

`v=144xx(5)/(18)=40 m//sec t=20` sec
`s=((u+v)/(2))t=((0+40)/(2))20=400m`
Promotional Banner

Topper's Solved these Questions

  • MOTION IN A PALNE

    ALLEN|Exercise EXERCISE-3|40 Videos
  • MOTION IN A PALNE

    ALLEN|Exercise SOLVED EXAMPLE|28 Videos
  • MOTION IN A PALNE

    ALLEN|Exercise EXERCISE-1|99 Videos
  • KINEMATICS-2D

    ALLEN|Exercise Exercise (O-2)|46 Videos
  • NEWTON'S LAWS OF MOTION & FRICTION

    ALLEN|Exercise EXERCISE (JA)|4 Videos

Similar Questions

Explore conceptually related problems

A car starts from rest and accelerates uniformly to a speed of 180 kmh^(-1) in 10 s. The distance covered by the car in the time interval is

If a car, initially at rest, accelerates uniformly to a speed of 50ms^-1 in 25s , distance travelled by it is

A car starting from rest accelerates uniformly to acquire a speed 20 km h^(-1) in 30 min. The distance travelled by car in this time interval will be :

A block of mass 10 kg accelerates uniformly from rest to a speed of 2 m/s in 20 sec. The average power developed in time interval of 0 to 20 sec is

A car accelerates from rest at constant rate for the first 10 s and covers a distance x. It covers a distance y in the next 10 s at the same acceleration. Which of the following is true?

A car of mass 1000kg accelerates uniformly from rest to a velocity of 54km//h in 5 seconds. Calculate (i) its acceleration (ii) its gain in KE (iii) average power of the engine during this period.

A car accelerates uniformly from 18 km//h to 36 km//h in 5 second. Calculate (i) the acceleration and (ii) the distance covered by the car in that time .

A man drives his car uniformly at 30 km/h for three hour After it he covered next 90 km distance with uniform speed of 45 km/hr. Find the average speed of car.

A car starts form rest and accelerates uniformly for 10 s to a velocity of 8 ms ^(-1) . It then runs at a constant velocity an dis finally brought to rest in 64 m with a constant retardation. The totla distance covered by the car is 584 m Find the value of acceleration, retardation, and totl time taken.

ALLEN-MOTION IN A PALNE-EXERCISE-2
  1. A car is moving on a straight road covers one third of the distance wi...

    Text Solution

    |

  2. Figure below shows the velocity-time graph of a one dimensional motion...

    Text Solution

    |

  3. If a car at rest, accelerates uniformly to a speed of 144 km//h in 20s...

    Text Solution

    |

  4. A body starts from rest, what is the ratio of the distance travelled b...

    Text Solution

    |

  5. The intial velocity of a particle is u (at t=0) and the acceleration i...

    Text Solution

    |

  6. If a body starts from rest and travels 120 cm in the 6th second, then ...

    Text Solution

    |

  7. If a train travelling at 72 km/h is to be brought to rest in a distanc...

    Text Solution

    |

  8. A car moving with a speed of 40 km//h can be stopped after 2m by apply...

    Text Solution

    |

  9. If a body starts from rest and travels 120 cm in the 6th second, then ...

    Text Solution

    |

  10. A car moving with a velocity of 10 ms^(-1) can be stopped by the appli...

    Text Solution

    |

  11. A body is dropped from a tower with zero velocity, reaches ground in 4...

    Text Solution

    |

  12. The graph between the displacement x and time t for a particle moving ...

    Text Solution

    |

  13. A body starts from rest and travels a distance x with uniform accelera...

    Text Solution

    |

  14. The position vector of a particle is given by vecr=vecr(0) (1-at)t, wh...

    Text Solution

    |

  15. The position vector of a particle is given by vecr() = vecr(0) (1-at...

    Text Solution

    |

  16. The position vector of a particle is given by vecr() = vecr(0) (1-at...

    Text Solution

    |

  17. The deceleration exerienced by a moving motor blat, after its engine i...

    Text Solution

    |

  18. A body is thrown verically upwards from the top A of tower. It reaches...

    Text Solution

    |

  19. A particle id dropped from trst from a large height. Assume g to be co...

    Text Solution

    |

  20. A body is released from the top of a smooth inclined plane of inclinat...

    Text Solution

    |