Home
Class 11
PHYSICS
A driver travelling at speed 36 kmh^(-1)...

A driver travelling at speed `36 kmh^(-1)` sees the light trun red at the intersection. If his reaction time is 0.6s, and then the car can deaccelerate at `4 ms^(-2)`. Find the stopping distance of the car.

Text Solution

Verified by Experts

The correct Answer is:
18.5 m

`Deltat=t-0.6=(0-10)/(-4)=2.5`

Stopping distance `=0.6xx10+1/2xx2.5xx10`
`6+12.5 m=18.5 m`
Promotional Banner

Topper's Solved these Questions

  • KINEMATICS

    ALLEN |Exercise Exercise-04[B]|14 Videos
  • KINEMATICS

    ALLEN |Exercise Exercise-05 [A]|11 Videos
  • KINEMATICS

    ALLEN |Exercise Comprehension#7|3 Videos
  • ERROR AND MEASUREMENT

    ALLEN |Exercise Part-2(Exercise-2)(B)|22 Videos
  • KINEMATICS (MOTION ALONG A STRAIGHT LINE AND MOTION IN A PLANE)

    ALLEN |Exercise BEGINNER S BOX-7|8 Videos

Similar Questions

Explore conceptually related problems

A car is moving with a velocity of 10 m/s. Suddenly driver sees a child at a distance of 30 m and he applies the brakes, it produced a uniform retardation in car and car stops in 5 second. Find (mass of car=1000 kg) the stopping distance of car will the car hit the child the retardation in car resistive force on car

A driver takes 0.20 s to apply the brakes after he sees a need for it. This is called the reaction time of the driver. If he ils driving a car at a speed of 54 km/h and the brakes cause a deceleration of 6.0 m/s^2 , find the distance travelled by the car after he sees the need to put the brakes on.

A car weighing 1000 kg is travelling at the speed of 15ms^(-1) . It decelerated due to brakes applied and stops after covering a distance of 25 m. Find the force exerted by the brakes and the work done by the brakes.

A driver decreases the speed of a car from 25 ms^(-1) to 1 0 ms^(-1) in 5 second. Find the acceleration of the car.

A rocket is fired vertically with a speed of 5 km s^(-1) from the earth’s surface. How far from the earth does the rocket go before returning to the earth ? Mass of the earth = 6.0 × 10^(24) kg, mean radius of the earth = 6.4 xx 10^(6) m , G = 6.67 xx 10^(-11) " N "m^(2) kg^(-2) .

A car is moving with speed u. Driver of the car sees red traffic light. His reaction time is t, then find out the distance travelled by the car after the instant when the driver decided to apply brakes. Assume uniform retardation 'a' after applying brakes.

ALLEN -KINEMATICS-EXERCISE-04[A]
  1. A parachutist after bailing out falls 52 m without friction. When the ...

    Text Solution

    |

  2. A tain, travelling at 20km/hr is approaching a platform. A bird is sit...

    Text Solution

    |

  3. A driver travelling at speed 36 kmh^(-1) sees the light trun red at th...

    Text Solution

    |

  4. A ball is thrown vertically upwards with a velcotiy of 20 ms^(-1) from...

    Text Solution

    |

  5. A balloon is going upwards with a constant velocity 15 m//s. When the ...

    Text Solution

    |

  6. A train moves from one station to another in two hours time. Its speed...

    Text Solution

    |

  7. A particle starts motion from rest and moves along a straight line. It...

    Text Solution

    |

  8. Two cars travelling towards each other on a straight road at velocity ...

    Text Solution

    |

  9. Two trains A and B 100 m and 60 m long are moving in opposite directio...

    Text Solution

    |

  10. In a harbour, wind is blowing at the speed of 72 km //h and the flag ...

    Text Solution

    |

  11. Two motor cars start from A simultaneously & reach B after 2 hour. The...

    Text Solution

    |

  12. n' number of particles are located at the verticles of a regular polyg...

    Text Solution

    |

  13. A man crosses a river by a boat. If he crosses the river in minimum ti...

    Text Solution

    |

  14. A particle is projected with a speed v and an angle theta to the horiz...

    Text Solution

    |

  15. A projectile is thrown with speed u making angle theta with horizontal...

    Text Solution

    |

  16. A particle is projected horizontally as shown from the rim of a large ...

    Text Solution

    |

  17. A food package was dropped from an aircraft flying horizontally. 6 s b...

    Text Solution

    |

  18. A Bomber flying upward at an angle of 53^(@) with the vertical release...

    Text Solution

    |

  19. A body falls freely from some altitude H. At the moment the first body...

    Text Solution

    |

  20. Two particles are projected from the two towers simultaneously, as sho...

    Text Solution

    |