Home
Class 11
PHYSICS
In the figure show , a person wants to r...

In the figure show , a person wants to raise a block lying on the ground to a height `h` . In which case he has to exert more force. Assume pulleys and strings are light .

A

(i)

B

(ii)

C

same in both

D

Cannot be determined

Text Solution

Verified by Experts

The correct Answer is:
A

(a) In first case,

In second case,

`therefore` In case, person will have to apply more force.
Promotional Banner

Topper's Solved these Questions

  • LAWS OF MOTION

    DC PANDEY|Exercise Assertion and reason|28 Videos
  • LAWS OF MOTION

    DC PANDEY|Exercise Match the columns|7 Videos
  • LAWS OF MOTION

    DC PANDEY|Exercise Check point 5.4|20 Videos
  • KINEMATICS 1

    DC PANDEY|Exercise INTEGER_TYPE|15 Videos
  • LAWS OF THERMODYNAMICS

    DC PANDEY|Exercise Level 2 Subjective|18 Videos

Similar Questions

Explore conceptually related problems

In the figure show , a person wants raise a block lying on the ground to a height h . In which case he has to exert more force. Assume pulleys and strings are light .

In the figure shown, a person wants to raise a block lying on the ground to a height h. in both the cases if time required is same then in which case he has to exert more force. Assume pulleys and strings light.

In fig., a person wants to rise a block lying on the ground to a height h. In both the cases, if the time required is same, then in which case he has to exert more force? Assuem pulleys and strigns light.

In figure shown, both blocks are released from rest. Length of 4 kg block is 2 m and of 1 K g is 4 m . Find the time they take to cross each other ? Assume pulley to be light and string to be light and inelastic .

There blocks a,b and c of massses 10 kg ,10 kg and 20 kg respectivaly are arrenged as shown in figure all the surface are frictionless and string is inextensible A constant force F= 20N MN is applied on block a as shown .pulley and string are light . part of block a as shown . pulley and string are light . part of the string connecting both pulleys is vertical and part of hte stings connecting pulleys with masses a and b are horizontal .

Under the condition shown in figure. Find out the minimum value of horizontal force F_(2) on pulley, which can be applied without causing any motion (assume pulley & strings are light)

The pulley shown in figure has a moment of inertia I about it's axis and its radius is R. Find the magnitude of the acceleration of the two blocks. Assume that the string is light and does not slip on the pulley.

Figure shows a block A constrained to slide along the inclined plane of the wedge B shown. Block A is attached with a string which passes through three ideal pulleys and connected to the wedge B. If wedge is pulled toward right with an acceleration a, find (a) the acceleration of the block with respect to wedge (b) the acceleration of the block with respect to ground.

The system starts from rest and A attains a velocity of 5m//s after it has moved 5m toward right. Assuming the arrangement to be frictionless everywhere and pulley and string to be light, the value of the constant force F applied on A is:

Three blocks of masses m_(1), m_(2) and M are arranged as shown in figure. All the surfaces are fricationless and string is inextensible. Pulleys are light. A constant force F is applied on block of mass m_(1) . Pulleys and string are light. Part of the string connecting both pulleys is vertical and part of the strings connecting pulleys with masses m_(1) and m_(2) are horizontal. {:((P),"Accleration of mass " m_(1),(1) F/(m_(1))),((Q),"Acceleration of mass" m_(2),(2) F/(m_(1)+m_(2))),((R),"Acceleration of mass M",(3) "zero"),((S), "Tension in the string",(4) (m_(2)F)/(m_(1)+m_(2))):}

DC PANDEY-LAWS OF MOTION-Chapter exercises (A) Taking it together
  1. A cricket ball of mass 150 g has an intial velocity u = (3 hati + 4 ha...

    Text Solution

    |

  2. In the pervious question (6), the magnitude of the momentum transferre...

    Text Solution

    |

  3. In the figure show , a person wants to raise a block lying on the grou...

    Text Solution

    |

  4. A body of mass 2kg travels according to the law x(t) = pt + qt^(2) + r...

    Text Solution

    |

  5. A body with mass 5 kg is acted upon by a force vec(F) = (- 3 hat (i) +...

    Text Solution

    |

  6. A block of mass m is placed on a smooth inclined plane of inclination ...

    Text Solution

    |

  7. A block has been placed on an inclined plane . The slope angle of thet...

    Text Solution

    |

  8. A 5000 kg rocket is set for vertical firing. The exhaust speed is 800 ...

    Text Solution

    |

  9. Two blocks are in contact on a frictionless table. One has mass m and ...

    Text Solution

    |

  10. A 4 kg block A is placed on the top of 8 kg block B which rests on a s...

    Text Solution

    |

  11. Find the value of friction forces between the blocks A and B and betwe...

    Text Solution

    |

  12. A block of mass 5 kg is kept on a horizontal floor having coefficient ...

    Text Solution

    |

  13. Two masses A and B of 10 kg and 5 kg, respectively , are connected wit...

    Text Solution

    |

  14. Two blocks of masses 2m and m are in equilibrium a shown in the figure...

    Text Solution

    |

  15. In the figure, pulleys are smooth and strings are massless, m(1)=1 kg ...

    Text Solution

    |

  16. If the coefficient of friction between A and B is mu, the maximum acce...

    Text Solution

    |

  17. A block of mass 1 kg is at rest elative to a smooth wedge moving leftw...

    Text Solution

    |

  18. A block of mass m is kept on an inclined plane of a lift moving down w...

    Text Solution

    |

  19. Two blocks of mass 5 kg and 3 kg are attached to the ends of a string ...

    Text Solution

    |

  20. A balloon of weight w is falling vertically downward with a constant a...

    Text Solution

    |