Home
Class 11
PHYSICS
A person carrying a box on his head is w...

A person carrying a box on his head is walking on a level road from one place to naother on a straight road is doing no work . The statement is `………….`

Text Solution

Verified by Experts

The correct Answer is:
B
Here as the weight of the person is not causing any displacement,so work done is zero.
Promotional Banner

Topper's Solved these Questions

  • WORK, ENERGY AND POWER

    KUMAR PRAKASHAN|Exercise SECTION - F Questions From Module (Sample questions for preparation of competitive exams)|23 Videos

  • WORK, ENERGY AND POWER

    KUMAR PRAKASHAN|Exercise QUESTION PAPER (SECTION - A)|6 Videos

  • WORK, ENERGY AND POWER

    KUMAR PRAKASHAN|Exercise SECTION - D NCERT Exemplar Solutions (Long Answer Type Questions)|5 Videos

  • WAVES

    KUMAR PRAKASHAN|Exercise SECTION-F (Questions From Module) (Sample questions for preparation of competitive exams)|23 Videos

Similar Questions

Explore conceptually related problems

A girl is carrying a school bag of 3 kg mass on her back and moves 200 m on a levelled road, then the work done against the gravitational force would be …………. J (Take g=10ms^(-2) )

A bird is tossing (flying to and fro) between two cars moving towards each other on a straight road. One car has a speed of 18 km/h while the other has the speed of 27 km/h. The bird starts moving from first car towards the other and is moving with the speed of 36 km/h and when the two cars were separated by 36 km. What is the total distance covered by the bird?

A person driving a car suddenly applies the brakes on seeing a child on the road ahead. If he is not wearing seat belt, he falls forward and hits his head against the steering wheel. Why

A drunkard is walking along a straight road. He takes five steps forward and three steps backward and so on. Each step is 1 m long and takes 1 s . There is a pit on the road 11 m , away from the starting point. The drunkard will fall into the pit after.

A car of mass m is driven with acceleration 'a' along a staright level road against a constant external resistive force R' . When velocity of car is v , the rate at which the engine of car is doing work will be ...........

In a second ODI match between England and India Bhuwnesh kumar bowled his medium fast bowling. He starts his run up from the distance of 50m from the stumps (bowling end) and at the time of bowling a ball,his speed is 36(km)//(hr) and the speed of ball is 144(km)//(hr) . If his mass is 70 kg and mass of the ball is (1)/(4)kg and the heat produce in his body is one tenth of the total work done by him, then Select the incorrect statement :

A woman starts from her home at 9.00 am, walks with a speed of 5 km h^(-1) on a straight road up to her office 2.5 km away, stays at the office up to 5.00 pm, and returns home by an auto with a speed of 25 km h^(-1) . Choose suitable scales and plot the x-t graph of her motion.

A woman starts from her home at 9.00 am, walks with a speed of 5 km h ^(-1) on a straight road up to her office 2.5 km away, stays at the office up to 5.00 pm, and returns home by an auto with a speed of 25 kmh^(-1). Choose suitable scales and plot the x-t graph of her motion.

The rear side of a truck is open and a box of 40 kg mass is placed 5 m away from the open end as shown in figure. The coefficient of friction between the box and the surface below it is 0.15. On a straight road, the truck starts from rest and accelerates with 2 ms^(2) . At what distance from the starting point does the box fall off the truck ? (Ignore the size of the box)

KUMAR PRAKASHAN-WORK, ENERGY AND POWER -SECTION - E Multiple Choice Questions (MCQs)
  1. Two identical balls A and B having velocities of 0.5 m/s and -0.3 m/s ...

    Text Solution

    |

  2. A particle moves from a point (-2hat(i) +5hat(j)) "to" (4 hat(j) +3 ha...

    Text Solution

    |

  3. Under the source of constant power a body start to move . Which one of...

    Text Solution

    |

  4. A body of mass 5 kg climb a height of 10 m by the force of 170 N . Its...

    Text Solution

    |

  5. If spring extends by x on loading , then enrgy stored by the spring ...

    Text Solution

    |

  6. A spring 40 mm long is stretched by the application of a force . If 10...

    Text Solution

    |

  7. A particle of mass m moving with velocity v is collide with a stationa...

    Text Solution

    |

  8. A person carrying a box on his head is walking on a level road from on...

    Text Solution

    |

  9. A body of mass 5 kg has momentum of 10 kg ms^(-1) when a force of 0.2 ...

    Text Solution

    |

  10. Which of the following is true ?

    Text Solution

    |

  11. A vec(F) = (5hat(i) +3hat(j) +2hat(k))N is applied over a particle w...

    Text Solution

    |

  12. A uniform cylinder of length L and mass M having cross - sectional ar...

    Text Solution

    |

  13. This question has statement -I and statement - II of the four choices...

    Text Solution

    |

  14. A particle of mass m moving in the x - direction with speed 2c is hit...

    Text Solution

    |

  15. A time dependent force F = 6t acts on a particle of mass 1 kg . If the...

    Text Solution

    |

  16. A particle is moving in a circular path of radius a under the action o...

    Text Solution

    |

  17. In a collinear collision a particle with an intial speed v(0) strike a...

    Text Solution

    |

  18. It is found that if a neutron suffers an elastic collinear collisio...

    Text Solution

    |

  19. A body initially at rest and sliding along a frictionlss track from a...

    Text Solution

    |

  20. A moving block having mass m , collides with another stationary block...

    Text Solution

    |