Home
Class 11
PHYSICS
A block of ,mass m =11.7 kg is to be pus...

A block of ,mass m =11.7 kg is to be pushed a distance of s=4.65 m. Assuming frictionless surface. Calculate the work done in applying a force parallel to the incline to push the block up at a constant speed. (Take, g=9.8 `ms^(-2)`)

A

328 J

B

656 J

C

164 J

D

530 J

Text Solution

Verified by Experts

The correct Answer is:
A
(a) Given, m=11.7 kg, s=4.65 m, h=2.86 m
From the figure, sin `theta=(2.86)/(4.65)=0.61`
Also, component of mg along the incline is mg `sin theta`.
`:. "Work done by this force" =mg sin theta.s`
`W_(F)+W_(g)=DeltaKE=0,W_(g)=-mgh`
`=11.7xx9.8xx0.61xx4.65`
`=11.7xx9.8xx2.86=327.9=328J`
Promotional Banner

Topper's Solved these Questions

  • WORK, ENERGY AND POWER

    DC PANDEY ENGLISH|Exercise MATCH THE COLUMNS|7 Videos

  • WORK, ENERGY & POWER

    DC PANDEY ENGLISH|Exercise Level 2 Comprehension Based|2 Videos

  • WORK, POWER AND ENERGY

    DC PANDEY ENGLISH|Exercise E Integer Type Questions|11 Videos

Similar Questions

Explore conceptually related problems

Find the horizontal velocity of the particle when it reach the point Q. Assume the block to be frictionless. Take g=9.8 m//s^(2) .

A block of mass m is pulled slowly by a minimum constant force on a rough ( mu ) horizontal surface through a distance x. Find work done by force F.

A block of mass m tied to a string is lowered by a distance d, at a constant acceleration of g//3 . The work done by the string is

A block of mass m tied to a string is lowered by a distance d, at a constant acceleration of g//3 . The work done by the string is

A block of mass m tied to a string is lowered by a distance d, at a constant acceleration of g//3 . The work done by the string is

An inclined plane is moving with Constant velocity v = 4 m//s on a horizoontal surface as shown in figure. If a block of mass 2 kg is kept at top of the incline and their is no friction between the block and the incline, then the distance travelled by the incline till the block reaches bottom of the inclined is (g = 10 m//s^(2))

A block of mass 2 kg is placed on the floor . The coefficient of static friction is 0.4 . If a force of 2.8 N is applied on the block parallel to floor , the force of friction between the block and floor is : (Taking g = 10 m//s^(2) )

A block of mass 2.0 kg is pushed down an inclined plane of inclination 37^0 with a force of 20N acting parallel to the incline. It is found that the block moves on the incline with an acceleration of 10 m/s^2 . If the block started from rest, find the work done a. by the applied force in the first second b. by the weight of the block in the first second and c. by the frictional force acting on the block in the first second. Take g=10 m/s^2 .

A block of mass 50 kg slides over a horizontal distance of 1m. If the coefficient of friction between their surface is 0.2, then work done against friction is (take g = 9.8 m//s^(2) ) :

A block of mass 2.0 kg kept at rest on an inclined plane of inclination 37^0 is pulledup the plane by applying a constant force of 20 N parallel to the incline. The force acts for one second. A. show that the work done by the applied force does not exceed 40 J. b. find the work work done by the applied force is 40 J. c. Find the kinetic energy of the block at the instant the force ceases to act. Take g=10 m/s^2 .

DC PANDEY ENGLISH-WORK, ENERGY AND POWER-MEDICAL ENTRACES GALLERY
  1. A block of mass 10 kg, moving in x-direction with a constant speed of ...

    Text Solution

    |

  2. A particle of mass m is driven by a machine that delivers a constant p...

    Text Solution

    |

  3. A block of ,mass m =11.7 kg is to be pushed a distance of s=4.65 m. A...

    Text Solution

    |

  4. A force F=(10+0.50x) acts on a particle in the x direction, where F is...

    Text Solution

    |

  5. An elevator weighing 500 kg is to be lifted up at a constant velocity ...

    Text Solution

    |

  6. The distance of closest approach of an alpha-particle fired at nucleus...

    Text Solution

    |

  7. Two bodies of different masses are moving with same kinetic energy. Th...

    Text Solution

    |

  8. Two bodies of masses 1 kg and 2 kg moving with same velocities are sto...

    Text Solution

    |

  9. One moving electron when comes closer to other stationary electron, th...

    Text Solution

    |

  10. A body of mass m, accelerates uniformly from rest to V(1) in time t(1)...

    Text Solution

    |

  11. A uniform chain of length l is placed on a smooth horizontal table, su...

    Text Solution

    |

  12. The kinetic energy of a body of mass 4 kg and momentum 6 N-s will be

    Text Solution

    |

  13. A body of mass m=3.90 kg slides on a horizontal frictionless table wit...

    Text Solution

    |

  14. A string of length L and force constant k is stretched to obtain exten...

    Text Solution

    |

  15. A body is initially at rest. It undergoes one dimensional motion with ...

    Text Solution

    |

  16. If two person A and B take 2 s and 4 s, respectively to lift an object...

    Text Solution

    |

  17. If , a machine gun fires n bullets per second each with kinetic energy...

    Text Solution

    |

  18. A uniform force of (3hati+hatj) N acts on a particle of mass 2kg. Henc...

    Text Solution

    |

  19. The power (P) of an engine lifting a mass of 100 kg up to a height of ...

    Text Solution

    |

  20. A body is mass 300 kg is moved through 10 m along a smooth inclined pl...

    Text Solution

    |