Home
Class 11
PHYSICS
A man of mass m stands on a platform of ...

A man of mass `m` stands on a platform of equal mass `m` and pulls himself by two ropes passing over pulleys as shown in figure. If he pulls each rope with a force equal to half his weight ,his upwards acceleration would be

A

`(g)/(2)`

B

`(g)/(4)`

C

g

D

zero

Text Solution

Verified by Experts

The correct Answer is:
D
(d) Total upward force`=2((mg)/(2))=mg`
[Weight of man is balanced by total tension acting upwards]
Total downward force is also mg
`therefore " " F_("net")=0=a_("net")`
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

A man of mass m stands on a plateform of equal mass m and pulls himself by two rops passing over pulleys as shown in figure.If he pulls each rop with a force equal to half his weight ,his upwards acceleration would be

A painter of mass M stands on a platfrom of mass m and pulls himself up by two ropes which hang over pulley as shown in fig. He pulls each rope with force F and moves upward with a uniform acceleration a. find a, neglecting the fact that no one could do this for long time.

A man of mass m stands on a frame of mass M. He pulls on a light rope, which passes over a pulley. The other end of the rope is attached to the frame. For the system to be in equilibrium, what force must the man exert on the rope?

A mam of mass 50 g stands on a frame of mass 30 g. He pulls on a light rope which passes over a pulley. The other end of the rope is attached to the frame. For the system to be in equilibrium what force man must exert on the rope?

Block A of mass m//2 is connected to one end of light rope which passes over a pulley as shown in fig. A man of mass m climbs the other end of rope with a relative acceleration of g//6 with respect to rope. Find the acceleration of block A and tension in the rope.

A man with mass 85 kg stands on a platform with mass 25 kg. He pulls on the free end of a rope that runs over a pulley on the ceiling and has its other end fastened to the platform. The mass of the rope and the mass of the pulley can be neglected, and the pulley is frictionless. With what force does he have to pull so that he and the platform have an upward acceleration of 2.2m/s^(2) . (Take g= 10m/s^(2) )

Two blocks of masses m and M are placed on a horizontal frictionless table connected by light spring as shown in figure. The Mass M is pulled to the right with a force F It the acceleration of mass m is a then the acceleration of M will be .

A uniform rope of mass (m) and length (L) placed on frictionless horizontal ground is being pulled by two forces F_(A) and F_(B) at its ends as shown in the figure. As a result, the rope accelerates toward the right. Acceleration (A) of the rope is

Two masses m_(1) and m_(2) are connected by light inextensible string passing over a smooth pulley P . If the pulley moves vertically upwards with an acceleration equal to g then .

DC PANDEY-LAWS OF MOTION-Chapter exercises (A) Taking it together
  1. The rear side of a truck is open and a box of mass 20kg is placed on t...

    Text Solution

    |

  2. Two blocks of masses m =5kg and M =10kg are connected by a string pass...

    Text Solution

    |

  3. A man of mass m stands on a platform of equal mass m and pulls himself...

    Text Solution

    |

  4. Block of mass m rests on the plank B of mass 3m which is free to slide...

    Text Solution

    |

  5. A ball is dropped on the floor from a height of 10m. It rebounds to a ...

    Text Solution

    |

  6. A chain of mass M and length L is held vertical by fixing its upper en...

    Text Solution

    |

  7. A 40 N block is supported by two ropes. One rope is horizontal and oth...

    Text Solution

    |

  8. Consider the shown arrangement. Assume all surfaces to be smooth. If ...

    Text Solution

    |

  9. In the above problem normal reaction between ground and wedge will hav...

    Text Solution

    |

  10. Starting from rest a body slides down a 45^(@) inclined plane in twice...

    Text Solution

    |

  11. A block of mass 0.1 is held against a wall applying a horizontal force...

    Text Solution

    |

  12. A block of mass m is given an initial downward velocity v(0) and left ...

    Text Solution

    |

  13. A block of mass m slides down an inclined plane which makes an angle t...

    Text Solution

    |

  14. The upper half of an inclined plane with inclination phi is perfectly ...

    Text Solution

    |

  15. Pushing force making an angle theta to the horizontal is applied on a ...

    Text Solution

    |

  16. In the arrangement shown in figure, there is a friction force between ...

    Text Solution

    |

  17. Two masses m and M are attached with strings as shown. For the system ...

    Text Solution

    |

  18. A man has fallen into a ditch of width d and two of his friends are sl...

    Text Solution

    |

  19. Two beads A and B move along a semicircular wire frame as shown in fig...

    Text Solution

    |

  20. Two blocks of masses m and 2 m are placed one over the other as shown ...

    Text Solution

    |