Home
Class 11
PHYSICS
A lift weighing 250 kg is to be lifted u...

A lift weighing 250 kg is to be lifted up at a constant velocity of 0.20 m. What would be the minimum horse power of the motor to be used ?

A

1.3 hp

B

0.65 hp

C

1.5 hp

D

0.75 hp

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

A sphere of mass 0.5 kg and diameter 1 m rolls without sliding with a constant velocity of 5 m//s . What is the ratio of the rotational K.E. to the total kinetic energy of thesphere ?

A motor van weighing 4400 kg rounds a level curve of radius 200 m on unbanked road at 60 kmph. What should be the minimum value of coefficient of friction to prevent skidding? At what angle the road should be banked for this velocity.

The coefficient of static friction, mu_(s) between block A of mass 2 kg and the table as shown in the figure is 0.2. What would be the maximum mass value of block B so that the two blocks do not move? The string and the pulley are assumed to be smooth and massless. (g=10m//s^(2))

A stone weighing 1 kg and sliding on ice with a velocity of 2 m / s is stopped by friction in 10 sec . The force of friction (assuming it to be constant) will be

A body of 37 kg rests on a rough horizontalsurface. The minimum horizontal force required to just start the motion is 68.5 N. In order to keep the body moving with a constant velocity a force of 43 N is needed. What is the value (i) of the coefficient of static friction (ii) the coefficient of kinetic friction?

An electric motor of 12 horse-power generates an angular velocity of 125 rad//s . What will be the frequency of rotation?

A body of mass 5 kg is lifted through a height of 20 m. Calculate the work done by the applied force.

A wooden box of mass 8kg slides down an inclined plane of inclination 30^(@) to the horizontal with a constant acceleration of 0.4ms^(-2) What is the force of friction between the box and inclined plane ? (g = 10m//s^(2)) .

A pump lifts 373 kg of water to a height of 10m in 98s. Find the power of the pump. Express it in horsepower.

A block of mas M is resting on an inclined plane as shown in the figure. The inclination of the plane to the horizontal is gradually increased. It is found that when the angle of inclination is theta the block just begins to slide down the plane. What is the minimum force F applied parallel to the plane that would just make the block move up the plane ?

TARGET PUBLICATION-LAWS OF MOTION-EXERCISE
  1. A particle of mass m is driven by a machine that delivers a constant p...

    Text Solution

    |

  2. The mass of a hydrogen molecule is 3.32xx10^(-27) kg. If 10^(23) hydro...

    Text Solution

    |

  3. A lift weighing 250 kg is to be lifted up at a constant velocity of 0....

    Text Solution

    |

  4. It is found that if a neutron suffers an elastic collinear collision w...

    Text Solution

    |

  5. A 100 N force acts horizontally on a block of 10 kg placed on horizont...

    Text Solution

    |

  6. A person trying to lose weight by burning fat lifts a mass of 10 kg up...

    Text Solution

    |

  7. A ball moving with a momemtum 5 kg "ms"^(-1) strikes a wall. If the in...

    Text Solution

    |

  8. A bullet of mass 4.2xx10^(-2) kg, moving at speed of 300" ms"^(-1), ge...

    Text Solution

    |

  9. A hammer of mass m(1) falls from a height h and drives a pile of mass ...

    Text Solution

    |

  10. The momentum of a body of mass 8 kg is 20 kg m/s. A force of 12 N acts...

    Text Solution

    |

  11. A 1 kg ball moving with a speed of 20 m/s strikes a hard wall at an an...

    Text Solution

    |

  12. A particle moves in the x-y plane under the influence of a force such ...

    Text Solution

    |

  13. A system of two particles is having masses m(1) and m(2). If the parti...

    Text Solution

    |

  14. Three masses of 2 kg, 12 kg and 4 kg are connected to each other with ...

    Text Solution

    |

  15. Two balls of masses 4 g and 10 g are moving with kinetic energies in t...

    Text Solution

    |

  16. A rope of mass 0.2 kg is connected at the same height of two opposite...

    Text Solution

    |

  17. At t=0, force F =kt is applied to a small body of mass m resting on a ...

    Text Solution

    |

  18. A body of mass 4m is split into two equal parts by an internal explosi...

    Text Solution

    |

  19. Assertion : The centre of mass of a body may lie where there is no mas...

    Text Solution

    |

  20. Particle A makes a perfectly elastic collision with anther particle B ...

    Text Solution

    |