Home
Class 11
PHYSICS
A sooterist moving with a speed of 36kmh...

A sooterist moving with a speed of `36kmh^(-1)` sees a child standing in the middle of the road. He applies the brakes and brings the scooter to rest in 5 s just in time to save child. Calculate the average retarding force on the vehicle, if mass of the vehicle and driver is 300 kg.

Text Solution

Verified by Experts

The correct Answer is:
600 N
Promotional Banner

Topper's Solved these Questions

  • LAWS OF MOTION : FRICTION

    SL ARORA|Exercise Problems|17 Videos

  • Laws of Motion

    SL ARORA|Exercise Exercise|627 Videos

  • Mathematical tools

    SL ARORA|Exercise Exercise|20 Videos

Similar Questions

Explore conceptually related problems

The driver of a three wheeler moving with a speed of 36 km//h sees a child standing in the middle of the road and brings his vehicle to rest in 4 s just in time to save the child What is the average retarding force on the vechicle ? The mass of three wheeler is 400 kg and mass of the driver is 65 kg .

on turning a corner a car driving at 36kmh^(-1) finds a child on the road 55 m abead. He immediately applies brakes,so as to stop within 5 m of the child . Calculate the retardation produced and the time taken by the car to stop .

On turning a corner, a motorist rushing at 44ms^(-1) finds a child on the road 100 m away. He applies the brakes so as to stop the motorcar within 1 m of the child. Calculate the time required to stop.

A hammer of mass 1 kg moving with a speed of 6 ms^(-1) strikes a wall and comes to rest in 0.1 sec. Calculate Average retardation of the hammer

A hammer of mass 1 kg moving with a speed of 6 ms^(-1) strikes a wall and comes to rest in 0.1 sec. Calculate Average retarding force that stops the hammer

A car is travelling on road at 50kmh^-1 . The driver applies brakes and brings the car to rest. Which frictional force does more work: (a) the force between the wheels and the brakes or (b) the force between the wheels and the road?

A driver is driving a car at a speed of 90km/h. he spots a child standing on his way and decided to apply the brakes but it took him 0.3s to actually apply the brakes. If the retardation produced by the brakes is 10m//s^(2) , calcualtion the total distance covered by car before coming to rest

A scooter of mass 150 kg is moving with a uniform velocity of 108 km/h. Then the force required to stop he vehicle in 10s is

A hammer of mass 1 kg moving with speed of 6 ms^(-1) strikes a wall and comes to rest in 0.1 s . Calculate (i) the impules of force (ii) the retardation of the hammer , and (iii) the retarding force that stops the hammer .

SL ARORA-LAWS OF MOTION : FRICTION-Self Practice
  1. A motor car running at the rate of 7ms^(1) can be stooped by applying ...

    Text Solution

    |

  2. A force of 50N is inclined to the vertical at an angle of 30^(@) Find ...

    Text Solution

    |

  3. A sooterist moving with a speed of 36kmh^(-1) sees a child standing in...

    Text Solution

    |

  4. A ship of mass 3xx10^7kg initially at rest, is pulled by a force of 5x...

    Text Solution

    |

  5. A body of mass 5 kg is acted upon by two perpendicular forces of 4 N a...

    Text Solution

    |

  6. Forces of 5sqrt2 and 6sqrt2N are acting on a body of mass 1000 kg at a...

    Text Solution

    |

  7. A bullet of mass 50g moving with a speed of 500 ms^(-1) is brought to ...

    Text Solution

    |

  8. A cricket ball of mass 150 kg is moving with a velocity of 12 m//s and...

    Text Solution

    |

  9. A hammer weighing 3 kg moving with a velocity of 10ms^(-1) strikes aga...

    Text Solution

    |

  10. A rubber ball of mass 50g falls from a height of 100cm and rebounds to...

    Text Solution

    |

  11. Two billiard balls each of mass 0 .05 kg moving in opposite directions...

    Text Solution

    |

  12. A machine gun has a mass of 20kg It fires 30g bullets at the rate of 4...

    Text Solution

    |

  13. A ball of mass 20 gram hits a wall at an angle of 45^(@) with a veloci...

    Text Solution

    |

  14. Two identical billiard balls striks a rigid wall with the same speed b...

    Text Solution

    |

  15. A force acting on a body of mass 2 kg varies with time as shown in fig...

    Text Solution

    |

  16. Fig. shows an estimated force-time graph for a base ball struck by a b...

    Text Solution

    |

  17. An elevator weighing 5000 kg is moving upward and tension in the sup...

    Text Solution

    |

  18. A body of 100 kg stands on a spring weighing machine inside a lift. Th...

    Text Solution

    |

  19. A woman weighing 50 kgf stands on a weighing machine placed in lift. W...

    Text Solution

    |

  20. A 75 kg man stands in a lift. What force does the floor does the floor...

    Text Solution

    |