Home
Class 11
PHYSICS
A box is pushed through a distance of 4m...

A box is pushed through a distance of 4m across a floor offering 100N resistance. How much work is done by the resisting force ?

Text Solution

Verified by Experts

The correct Answer is:
D

`F=100N,S=4m, theta=0^0`
`W=vecF.vecS=100xx4=400J`
Promotional Banner

Topper's Solved these Questions

  • WORK AND ENERGY

    HC VERMA|Exercise Objective -2|9 Videos
  • WAVE MOTION AND WAVES ON A STRING

    HC VERMA|Exercise Exercises|57 Videos

Similar Questions

Explore conceptually related problems

A body is moving along a circular path . How much work is done by the entripetal force ?

A force F is applied on a block of mass M . The block is displaced through a distance d in the direction of the force. What is the work done by the force on the block? Does the internal energy change because of this work?

Consider a drop of rain water having mass 1 g falling from a height of 1 km.It hits the ground with a speed of 50m//s .Take 'g' constant with a value 10m//s^2 .The work done by the resistive force of air is :

A particle of mass 1 g and charge 2. 5 xx10^(-4) C is released from rest in an electric field of 1.2 xx 10^4 NC^(-1) (a) Find the electric force and the force of gravity acting on this particle. Can one of these forces be neglected in comparison with the other for approximate analysis? (b) How long will it take for the particle to travel a distance of 40 cm? (c) What will be the speed of the particle after travelling this destance? (d) how much is the work done by electric force on the particle during this period?

A particle moves from a point (-2hati +5 hatj) to (4 hatj + 3 vec k) when a force of (4hati +3 hatj) N is applied . How much work has been done by the force?

In a circuit, 10 C of charge is passed through a battery in a given time. The plates of the battery are maintained at a potential difference of 12 V. How much work is done by the battery?.

A current i_1 = i_0 sin omegat passes through a resistor of resistance R . How much thermal energy is produced in one time period? A current i_2 = -i_0 sin omegat passes through the resistor. How much thermal energy is produced in one time period? If i_1 and i_2 both pass through the resistor simultaneously, how much thermal energy is produced? Is the principle of superposition obeyed in this case?

A heavy box is kept on a smooth inclined plane and is pushed up by a force F acting parallel to the plane. Does the work done by the force F as the box goes from A to B depend on how fast the box was moving at A and B? does the work by the force of gravity depend on this?

A box weighing 2000 N is to be slowly slid through 20 m on a straigh track having friction coefficient 0.2 with the box. A find the work done by the person pulling the box wilth a chain at angle theta with the horizontal. B. find the work when the person has chosen a value of theta which ensures him the minimum magnitude of the force.

A spring of spring constant 50 N/m is compressed from its natural position through 1 cm. Find the work done by the spring force on the agency compressing the spring.

HC VERMA-WORK AND ENERGY-Exercises
  1. The mass of a cyclist together with the bicycle is 90 kg. Calculate th...

    Text Solution

    |

  2. A block of mass 2.00 kg moving at a speed of 10.0 m/s accelerates at 3...

    Text Solution

    |

  3. A box is pushed through a distance of 4m across a floor offering 100N ...

    Text Solution

    |

  4. A block of mass 5.0 kg slides down an incline of inclination 30^0 and ...

    Text Solution

    |

  5. A constant force of 2.50 N accelerates a stationary particle of mass 1...

    Text Solution

    |

  6. The amount of work done by centripetal force on the object moving in a...

    Text Solution

    |

  7. A man moves on a straight horizontal road with a block of mass 2 kg i...

    Text Solution

    |

  8. A force F=a+bx acts on a particle in the x-directioin, where a and b a...

    Text Solution

    |

  9. A block of mass 250 g slides down an incline of inclination 37^0 with ...

    Text Solution

    |

  10. In the adjacent figure BE bot DA and CDbotDA then prove that mangle1 ~...

    Text Solution

    |

  11. A box weighing 2000 N is to be slowly slid through 20 m on a straigh t...

    Text Solution

    |

  12. A block of weight 100 N is slowly slide up on a smooth incline of incl...

    Text Solution

    |

  13. Find the average frictional force needed to stop a a car weighing 500 ...

    Text Solution

    |

  14. Find the averasge force needed to accelerate a car weighing 500 kg for...

    Text Solution

    |

  15. A particle of mass m moves on a straight line with its velocity varyin...

    Text Solution

    |

  16. A block of mass 2.0 kg kept at rest on an inclined plane of inclinatio...

    Text Solution

    |

  17. A block of mass 2.0 kg is pushed down an inclined plane of inclination...

    Text Solution

    |

  18. A 250 g block slides on aeroug horizontal table. Find the work donen b...

    Text Solution

    |

  19. Water falling from a 50 m high fall is to be used for generating elect...

    Text Solution

    |

  20. A person is climbing a ladder with a suitcase on his head. Then the wo...

    Text Solution

    |