Home
Class 11
PHYSICS
With what minimum acceleration can a fir...

With what minimum acceleration can a fireman slide down a rope while breaking strength of the rope is `(2)/(3)` of his wieght ?

A

g

B

`frac(2)(3) g`

C

`frac(1)(3) g`

D

`zero`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • Gravitation

    TARGET PUBLICATION|Exercise Exercise|273 Videos

  • MAGNETIC EFFECT OF ELECTRIC CURRENT

    TARGET PUBLICATION|Exercise Evaluation Test|12 Videos

Similar Questions

Explore conceptually related problems

With what minimum acceleration can a fireman slide down a rope whose breaking strength is (2//3) of his weight?

A lift of mass 'm' is connected to a rope which is moving upward with maximum acceleration 'a'. For maximum safe stress, the elastic limit of the rope is 'T'. The minimum diameter of the rope is (g = gravitational acceleration)

A pendulum consisting of a small sphere of mass m, suspended by an inextensible and massless string of length 1, is made to swing in a vertical plane. If the breaking strength of the string is 2 mg, then the maximum angular amplitude of the displacement from the vertical can be

A nylon rope of 2 cm in diameter has a breaking strength of 1.5 xx 10^(5) N . The breaking strength of a similar rope of 1cm in diameter is

Two particles of equal mass have velocities vec v_1 = 2 hat i= m//s^-1 and vec v_2 = 2hat j m//s^-1 . First particle has an acceleration vec a_1= (3 hat i+ 3 hat j) ms^-2 while the acceleration of the other particle is zero. The centre of mass of the two particles moves in a path of.

One end of a massless rope, which passes over a massless and frictionless pulley P is tied to a hook C while the other end is free. Maximum tension that the rope can bear is 360 N. With what value of minimum safe accleration with value of minimum safe acceleration (in "m s"^(-2) ) can a monkey of 60 kg move down on the rope?

A large ball 2 m in radius is made up of a rope of square cross section with edge length 4 mm. Negleting the air gaps in the balol, what is total length of the rope to the nearest order of magnitude?

Fill in the blanks and complete the following paragraph . (words given: upward, friction,negligible,downward , gravitational , buoyance , very large, electric) When a body falls in air, there are three forces acting on the body : (1) the gravitational force due to the earth, acting........(2) the force of ........ due to air, acting .....(3) the force due to...... with air, acting in the direction oppositeto that of the velocity of the body. Under certain conditions, the force of buoyancy due to air and friction with air can be....... compared to the.......force of the earth. In that case (near the earth's surface) the body falls with almost uniform acceleration (g). Whenever a body moves under the influence of the force of gravity alone, it is said to be falling freely. Strictly speaking, this is true only if the body falls in vaccum.

Answer the following questions: What is the periodic trend in the variation of valency while going down a group? Explain your answer with refrence to the group 1, group 2 and group 18.

The rope shown at an instant is carrying a wave travelling towards right, created by a source vibrating at a frequency n . Consider the following statements I. The speed of the wave is 4n xx ab II. The medium at a will be in the same phase as d after (4)/(3n)s III. The phase difference between b and e is (3pi)/(2) Which of these statements are correct

TARGET PUBLICATION-LAWS OF MOTION-EXERCISE
  1. Consider the following statement: When jumbing from some height, you s...

    Text Solution

    |

  2. Which of the following has maximum momentum ?

    Text Solution

    |

  3. With what minimum acceleration can a fireman slide down a rope while b...

    Text Solution

    |

  4. A cold soft drink is kept on the balance. When the cap is open, then t...

    Text Solution

    |

  5. A stationary body of mass 3 kg explodes into three equal pieces. Two o...

    Text Solution

    |

  6. A steel bar AB of mass 10 kg and length 1 m is kept horizontal by supp...

    Text Solution

    |

  7. Three blocks with masses m, 2m and 3m, are connected by strings, as sh...

    Text Solution

    |

  8. Three forces start acting simultaneously on a particle moving with vel...

    Text Solution

    |

  9. A rocket with a life-off mass 3.5xx10^(4) kg is blasted upwards with a...

    Text Solution

    |

  10. A body of mass 50 kg is suspended using a spring balance inside a lift...

    Text Solution

    |

  11. A stone of mass 0.05 kg is thrown vertically upwards. What is the dire...

    Text Solution

    |

  12. A man weighing 60 kg is in a lift moving down with an acceleration of ...

    Text Solution

    |

  13. A balloon has 5 g of air. A small hole is pierced into it. The air esc...

    Text Solution

    |

  14. Three blocks A, B and C of masses 4 kg, 2 kg and 1 kg respectively, ar...

    Text Solution

    |

  15. Three blocks of mass 3 kg, 2 kg and 1 kg are placed side-by-side on sm...

    Text Solution

    |

  16. Three masses m, 2m and 3m are attached with light string passing over ...

    Text Solution

    |

  17. A mass of 1 kg is suspended by means of a thread. The system is (i) li...

    Text Solution

    |

  18. Two blocks A and B of masses 3m and m respectively are connected by a ...

    Text Solution

    |

  19. When a force F is applied to a mass m(1), its acceleration is 6" m"//"...

    Text Solution

    |

  20. A body slides down in a time ‘f from rest along a smooth inclined plan...

    Text Solution

    |