Home
Class 12
PHYSICS
A man weighing 60kg goes up a staircase...

A man weighing 60kg goes up a staircase 5 m high in 20 sec. Calculate the power in watts `g=9.8m//s^2`.

Promotional Banner

Topper's Solved these Questions

  • WAVES

    MBD PUBLICATION|Exercise QUESTION BANK|295 Videos

Similar Questions

Explore conceptually related problems

Velocity of light in transparent medium is 2 xx 10^8 m/sec. Calculate the refractive index.

How many 2.5 kg bricks can a man carry up a staircase 3.6m high in one hour if he works at the average rate of 9.8 watt ?

A man weighting 60 kg is standing in lift. Find the thrust on the floor of the lift when (a) lift ascending wih an acceleration of 4 m / s^2 .(b) lift descends with an acceleraion of 4 m // s^2 (g = 10 m // s^2) .

A force is removed after applying on a body for a 5 sec and the body covers 25 m in the next 5 sec. Calculate the value of the force if the mass of body in 10 kg.

A body having a mass 100 gm is allowed to fall freely under gravity. Calculate KE after 10 seconds g=9.8 m//s^(-2) .

A ballon is rising with a velocity of 9.8 m/s and a bag is dropped from it when it is at a height of 39.2 m. Calculate the time taken by the bag to reach the ground.

A lift starts from rest with constant upward acceleration . It moves 1.5m in the first 0.4 secs. A person standing in the lift hold a packet of 2 kg by a string. Calculate the tension in the string during the motion.

Calculate the power developed by mass weighing 70 kg in climbing up a vertical staircase at the rate of 1 m/s.

A body of mass 5 kg rotates in a circle of radius 2m with a uniform speed of 3 m/s calculate the centripetal force

MBD PUBLICATION-WORK, ENERGY AND POWER-QUESTION BANK
  1. State of law of conservation of mass.

    Text Solution

    |

  2. An engine pulls a train over 5 km of distance by applying a force of 5...

    Text Solution

    |

  3. A man weighing 60kg goes up a staircase 5 m high in 20 sec. Calculate...

    Text Solution

    |

  4. If the momentum of a body is doubled, how will its kinetic energy vary...

    Text Solution

    |

  5. A light body moving in a straight line with a velocity of 10 ms^(-1) m...

    Text Solution

    |

  6. What is conserved in the elastic collision of two bodies ?

    Text Solution

    |

  7. A light body and a heavy body have, same kinetic energy. Which one wil...

    Text Solution

    |

  8. A particle of mass 6 kg moves accordings to the law x=0.2 t^2-0.02 t^3...

    Text Solution

    |

  9. State the law of conservation of energy and the law of conservation of...

    Text Solution

    |

  10. A light body and a heavy body have, same kinetic energy. Which one wil...

    Text Solution

    |

  11. A very heavy body moving with a velocity of 10 ms^(-1)makes a head on ...

    Text Solution

    |

  12. Two bodies of mass 1 kg and 2 kg have equal momentum. The ratio of the...

    Text Solution

    |

  13. What is perfectly elastic collision ?

    Text Solution

    |

  14. A very heavy body moving with a velocity of 10 ms^(-1)makes a head on ...

    Text Solution

    |

  15. Two bodies of mass 1 kg and 2 kg have equal momentum. The ratio of the...

    Text Solution

    |

  16. What are conservative forces ? Give example .

    Text Solution

    |

  17. A bomb of mass 9 kg explodes into two pieces of mass 3 kg and 6 kg. Th...

    Text Solution

    |

  18. A body weighs one Newton at the surface of the earth. What will be it’...

    Text Solution

    |

  19. The ratio of kinetic energy and potential energy of an electron in any...

    Text Solution

    |

  20. In an elastic collision which quantities are conserved ?

    Text Solution

    |