Home
Class 11
PHYSICS
A person driving a car suddenly applies ...

A person driving a car suddenly applies the brakes on seeing a child on the road ahead. If he is not wearing seat belt, he falls forward and hits his head against the steering wheel. Why

Text Solution

Verified by Experts

When a person driving a car suddenly applies the breaks the upper part of the body continue to move forward due to inertial of motion .Lower part of the body slow down with car.
If he not wearing seat belt he falls forward and can hit his head against steering wheel.
Promotional Banner

Topper's Solved these Questions

  • LAW OF MOTION

    KUMAR PRAKASHAN|Exercise SECTION -E(MULTIPLE CHOICE QUESTIONS) (MCQS)|69 Videos

  • LAW OF MOTION

    KUMAR PRAKASHAN|Exercise SECTION-F (QUESTIONS FROM MODULE)|22 Videos

  • LAW OF MOTION

    KUMAR PRAKASHAN|Exercise SECTION-C(OBJECTIVE QUESTIONS) (VSQS)|55 Videos

  • GRAVITATION

    KUMAR PRAKASHAN|Exercise QUESTIONS PAPER Section - D|1 Videos

  • MACHANICAL PROPERTIES OF SOLIDS

    KUMAR PRAKASHAN|Exercise QUESTION PAPER|11 Videos

Similar Questions

Explore conceptually related problems

When a situation demands our immediate action, it takes some time before we really respond. Reaction time is the time a person takes to observe, think and act. For example, if a person is driving and suddenly a boy appears on the road, then the time elapsed before he slams the brakes of the car is the reaction time. Reaction time depends on complexity of the situation and on an individual. You can measure your reaction time by a simple experiment. Take a ruler and ask your friend to drop it vertically through the gap between your thumb and forefinger . After you catch it, find the distance d travelled by the ruler. In a particular case, d was found to be 21.0 cm. Estimate reaction time.

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.

Rohit is a car driver working for Mr Joshi. One day Rohit complained that he had difficulty in driving the car because he could not see the distant traffic clearly though he could see the nearby objects clearly. Mr Joshi took Rohit to an eye hospital. The eye specialist doctor checked and tested his eyes with various machines and gave him the name and power of the lenses to be worn as spectacles. Mr Joshi paid for the required spectacles for the driver. By wearing these spectacles, the driver could now see even the distant vehicles and people on the road clearly. He thanked Mr Joshi for this. Name the eye defect Rohit is suffering from.

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

You saw a tragic road accident resulting in death of two persons. The reason for that is bike rider tried to overtake the truck from wrong-side with overspeed. He was not wearing a helmet that caused head injury. You were scared because you also have same habit to drive activa without wearing helmet. Your father often warned you that to drive vehicle without a driving licence is a crime. Injury to which part of brain leads to instant death of an individual ? Why ?

Rohit is a car driver working for Mr Joshi. One day Rohit complained that he had difficulty in driving the car because he could not see the distant traffic clearly though he could see the nearby objects clearly. Mr Joshi took Rohit to an eye hospital. The eye specialist doctor checked and tested his eyes with various machines and gave him the name and power of the lenses to be worn as spectacles. Mr Joshi paid for the required spectacles for the driver. By wearing these spectacles, the driver could now see even the distant vehicles and people on the road clearly. He thanked Mr Joshi for this. What values (or qualities) do you learn from Mr Joshi in this episode ?

You saw a tragic road accident resulting in death of two persons. The reason for that is bike rider tried to overtake the truck from wrong-side with overspeed. He was not wearing a helmet that caused head injury. You were scared because you also have same habit to drive activa without wearing helmet. Your father often warned you that to drive vehicle without a driving licence is a crime. Which part of brain is involved into learning how to drive vehicle ?

Rohit is a car driver working for Mr Joshi. One day Rohit complained that he had difficulty in driving the car because he could not see the distant traffic clearly though he could see the nearby objects clearly. Mr Joshi took Rohit to an eye hospital. The eye specialist doctor checked and tested his eyes with various machines and gave him the name and power of the lenses to be worn as spectacles. Mr Joshi paid for the required spectacles for the driver. By wearing these spectacles, the driver could now see even the distant vehicles and people on the road clearly. He thanked Mr Joshi for this. What could be the two possible reasons for his eye defect? What type of lenses do you think the doctor recommended for Rohit's spectacles ?

You saw a tragic road accident resulting in death of two persons. The reason for that is bike rider tried to overtake the truck from wrong-side with overspeed. He was not wearing a helmet that caused head injury. You were scared because you also have same habit to drive activa without wearing helmet. Your father often warned you that to drive vehicle without a driving licence is a crime. Which gland became more active when you saw the accident ? Which hormone was poured in blood ? What changes did you feel in body?

The driver of a bus travelling with a speed 'v' suddenly observes a wall in front of his bus at a distance 'a'. Father of this driver, who was also a driver, had advised him to take circular turn to avoid hitting in such a situation. However, the driver in question decides otherwise by using his own wisdom. He applies brakes as hard as possible without taking a circular turn, then :

KUMAR PRAKASHAN-LAW OF MOTION-SECTION-D(NCERT EXEMPLAR SOLUTIONS)
  1. A person of mass 50 kg stands on a weighing scale on a lift. If the li...

    Text Solution

    |

  2. The position-time graph of a body of mass 2 kg is as given in figure. ...

    Text Solution

    |

  3. A person driving a car suddenly applies the brakes on seeing a child o...

    Text Solution

    |

  4. The velocity of a body of mass 2 kg as a function of t is given by v(t...

    Text Solution

    |

  5. A block placed on a rough horizontal surface is pulled by a horizontal...

    Text Solution

    |

  6. Why are porcelain objects wrapped in paper or straw before packing for...

    Text Solution

    |

  7. Why does a child feel more pain when she falls down on a hard cement f...

    Text Solution

    |

  8. A women throws an object of mass 500 g with a speed of 25 ms- 1 . (a...

    Text Solution

    |

  9. Why are mountain roads generally made winding upwards rather than goin...

    Text Solution

    |

  10. A mass of 2 kg suspended with thread AB (figure). Thread CD of the sam...

    Text Solution

    |

  11. In the above given problem if the lower thread is pulled with a jerk, ...

    Text Solution

    |

  12. Two masses of 5 kg and 3 kg are suspended with help of massless inexte...

    Text Solution

    |

  13. Block A of weight 100 N rests on a frictionless inclined plane of slop...

    Text Solution

    |

  14. A block of mass M is held against a rough vertical well by pressing it...

    Text Solution

    |

  15. A 100 kg gun fires a ball of 1 kg horizontally from a cliff of height ...

    Text Solution

    |

  16. (x, t), (y, t) diagram of a particle moving in 2-dimensions If the...

    Text Solution

    |

  17. A person in an elevator accelerating upwards with an acceleration of 2...

    Text Solution

    |

  18. There are three forces F(1) F(2) and F(3) acting on a body, all acting...

    Text Solution

    |

  19. When a body slides down from rest along a smooth inclined plane making...

    Text Solution

    |

  20. (v(x) ,t), and (v(y) t) diagram for a body of unit mass. Find the forc...

    Text Solution

    |