Home
Class 12
PHYSICS
A thief stole a box full of valuable art...

A thief stole a box full of valuable articles of weight W and while carrying it on his back, he jumped down a wall of height ‘ h ’ from the ground. Before he reached the ground he experienced a load of

A

2W

B

W

C

W/2

D

zero

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • NEWTON'S LAWS OF MOTION & FRICTION

    MOTION|Exercise Exercise - 1 SECTION-B :- Pulley Block System|12 Videos
  • NEWTON'S LAWS OF MOTION & FRICTION

    MOTION|Exercise Exercise - 1 SECTION-C :- Pseudo force, Weighing Machine|11 Videos
  • NEWTON'S LAWS OF MOTION & FRICTION

    MOTION|Exercise Questions For Practice|25 Videos
  • MODERN PHYSICS -1

    MOTION|Exercise EXERCISE-4 ( LEVEL- II)|39 Videos
  • NLM & FRICTION

    MOTION|Exercise EXERCISE-4 ( LEVEL-II)|15 Videos

Similar Questions

Explore conceptually related problems

A man of mass m having a bag ofmas m slips from the roof of atall building of height H and starts falling vertically figure. When at a height h from the ground, he notices that the ground below him is pretty hard but there is a pond at a horizontal distnce x from the line of fall. In order to save himself he throws the bag horizontally (with respect to himself) in the direction opposite to the pond. Calculate the minimum horizontal velocity imparted to the bag so that the man lands in the water. If the man just suceeds toavoid the hard ground, where will the bag land?

A man whose mass is m kg jumps vertically into air from the sitting position in which his centre of mass is at a height h_(1) from the ground. When his feet are just about to leave the ground his centre of mass is at height h_(2) from the ground and finally centre of mass rises to h_(3) above the ground when he is at the top of the jump. what is the average upward force exerted by the ground on him?

A man whose mass is m kg jumps vertically into air from a sitting position in which his centre of mass is at a height h_(1) from the ground. When his feet are just about to leave the ground his centre of mass is h_(2) from the ground and finally rises to h_(3) when he is at top of the jump . What is the average upwards force exerted by the ground on him ?

An inquistive student, determined to test the law of gravity for himself, walks to the top of a building og 145 floors, with every floor of height 4 m, having a stopwatch in his hand (the first floor is at a height of 4 m from the ground level). From there he jumps off with negligible speed and hence starts rolling freely. A rocketeer arrives at the scene 5 s later and dives off from the top of the building to save the student. The rocketeer leaves the roof with an initial downward speed v_0 . In order to catch the student at a sufficiently great height above ground so that the rocketeer and the student slow down and arrive at the ground with zero velocity. The upward acceleration that accomplishes this is provided by rocketeer's jet pack, which he turns on just as he catches the student, before the rocketeer is in free fall. To prevent any discomfort to the student, the magnitude of the acceleration of the rocketeer and the student as they move downward together should not exceed 5 g. Just as the student starts his free fall, he presses the button of the stopwatch. When he reaches at the top of 100th floor, he has observed the reading of stopwatch as 00:00:06:00 (hh:mm:ss:100 th part of the second). Find the value of g. (correct upt ot two decimal places).

An inquistive student, determined to test the law of gravity for himself, walks to the top of a building og 145 floors, with every floor of height 4 m, having a stopwatch in his hand (the first floor is at a height of 4 m from the ground level). From there he jumps off with negligible speed and hence starts rolling freely. A rocketeer arrives at the scene 5 s later and dives off from the top of the building to save the student. The rocketeer leaves the roof with an initial downward speed v_0 . In order to catch the student at a sufficiently great height above ground so that the rocketeer and the student slow down and arrive at the ground with zero velocity. The upward acceleration that accomplishes this is provided by rocketeer's jet pack, which he turns on just as he catches the student, before the rocketeer is in free fall. To prevent any discomfort to the student, the magnitude of the acceleration of the rocketeer and the student as they move downward together should not exceed 5 g. What should be the initial downward speed of the rocketeer so that he catches the student at the top of 100 the floor for safe landing ?

An inquistive student, determined to test the law of gravity for himself, walks to the top of a building og 145 floors, with every floor of height 4 m, having a stopwatch in his hand (the first floor is at a height of 4 m from the ground level). From there he jumps off with negligible speed and hence starts rolling freely. A rocketeer arrives at the scene 5 s later and dives off from the top of the building to save the student. The rocketeer leaves the roof with an initial downward speed v_0 . In order to catch the student at a sufficiently great height above ground so that the rocketeer and the student slow down and arrive at the ground with zero velocity. The upward acceleration that accomplishes this is provided by rocketeer's jet pack, which he turns on just as he catches the student, before the rocketeer is in free fall. To prevent any discomfort to the student, the magnitude of the acceleration of the rocketeer and the student as they move downward together should not exceed 5 g. In Q.1, what would be the approximate retardation to be given by jet pack along for safe landing?

An inquistive student, determined to test the law of gravity for himself, walks to the top of a building og 145 floors, with every floor of height 4 m, having a stopwatch in his hand (the first floor is at a height of 4 m from the ground level). From there he jumps off with negligible speed and hence starts rolling freely. A rocketeer arrives at the scene 5 s later and dives off from the top of the building to save the student. The rocketeer leaves the roof with an initial downward speed v_0 . In order to catch the student at a sufficiently great height above ground so that the rocketeer and the student slow down and arrive at the ground with zero velocity. The upward acceleration that accomplishes this is provided by rocketeer's jet pack, which he turns on just as he catches the student, before the rocketeer is in free fall. To prevent any discomfort to the student, the magnitude of the acceleration of the rocketeer and the student as they move downward together should not exceed 5 g. The position - time graph for rocketeer would be (take the top of building as origin, and vertical downward direction as positive y-axis.)

An inquistive student, determined to test the law of gravity for himself, walks to the top of a building og 145 floors, with every floor of height 4 m, having a stopwatch in his hand (the first floor is at a height of 4 m from the ground level). From there he jumps off with negligible speed and hence starts rolling freely. A rocketeer arrives at the scene 5 s later and dives off from the top of the building to save the student. The rocketeer leaves the roof with an initial downward speed v_0 . In order to catch the student at a sufficiently great height above ground so that the rocketeer and the student slow down and arrive at the ground with zero velocity. The upward acceleration that accomplishes this is provided by rocketeer's jet pack, which he turns on just as he catches the student, before the rocketeer is in free fall. To prevent any discomfort to the student, the magnitude of the acceleration of the rocketeer and the student as they move downward together should not exceed 5 g. The correct velocity - time graph for the rocketeer would be

A man weighing 100 kg carriesa load of 10kg on his head. He jumps from a tower with the load on his head. What will be the weight of the load as experienced by the man?

MOTION-NEWTON'S LAWS OF MOTION & FRICTION -Exercise - 1 (SECTION-A:- String Constrained, Wedge Constrained, Newtons Law theory Question, Equillibrium Questions (Normal and Tension), Problems with Acceleration (F=ma), Wedge problems)
  1. When an object is in equilibrium state, then -

    Text Solution

    |

  2. When a force of constant magnitude and a fixed direction acts on a mov...

    Text Solution

    |

  3. An object of mass 2kg is sliding with a constant velocity of 4ms^(-1) ...

    Text Solution

    |

  4. In which of the following graphs, the total change in momentum is zero...

    Text Solution

    |

  5. A weight mg is suspended from the middle of a rope whose ends are at t...

    Text Solution

    |

  6. Three blocks A,B and C are suspended as shown in the figure. Mass of e...

    Text Solution

    |

  7. A force - time graph for a linear motion is shown in the figure where ...

    Text Solution

    |

  8. The 50kg homogenous smooth sphere rests on the 30^(@) incline A and b...

    Text Solution

    |

  9. The linear momentum P of a body varies with time and is given by the e...

    Text Solution

    |

  10. A person says that he mesured the acceleration of a particle to be non...

    Text Solution

    |

  11. A thief stole a box full of valuable articles of weight W and while ca...

    Text Solution

    |

  12. In a rocket, fuel burns at the rate of 2 kg/s. This fuel gets ejected ...

    Text Solution

    |

  13. A diwali rocket is ejecting 0.05kg of gases per second at a velocity o...

    Text Solution

    |

  14. Three block are connected as shown, on a horizontal frictionless table...

    Text Solution

    |

  15. Blocks are in contact on a frictionless table. A horizontal force F = ...

    Text Solution

    |

  16. A rope of mass 5 kg is moving vertically in vertical position with an ...

    Text Solution

    |

  17. Find the velocity of the hanging block if the velocities of the free e...

    Text Solution

    |

  18. In the figure shown the velocity of different blocks is shown. The vel...

    Text Solution

    |

  19. A lift of mass 100 kg starts moving from rests in the upward direction...

    Text Solution

    |

  20. Mark the correct statements about the friction between two bodies - ...

    Text Solution

    |