Home
Class 11
PHYSICS
A person of mass 60 kg stands on a weigh...

A person of mass 60 kg stands on a weighing scale in a lift (elevator). What would the scale read if the elevator moves
(i) up with a uniform speed of `5 m//s`
(ii) down with a uniform acceleration of `4 m//s^2`
(iii) up with a uniform acceleration of `4 m//s^2`?
[Given :`g = 10 m//s^2`]

Promotional Banner

Topper's Solved these Questions

  • GRAVITATION

    CHETANA PUBLICATION|Exercise EXERCISE|76 Videos

  • MAGNETISM

    CHETANA PUBLICATION|Exercise EXERCISE|118 Videos

Similar Questions

Explore conceptually related problems

A man of mass 80 kg stands in an elevator. Calculate his apparent weight when, (iv) the elevator cable breaks (g = 10 m//s^2)

A man of mass 80 kg stands in an elevator. Calculate his apparent weight when, (ii) elevator is uniformly accelerated upwards at 2 m//s^2

A body starts from rest and moves with a uniform acceleration of 4 m//s^2 ?. Calculate the displacement of the body in 10 seconds.

A body moves with a uniform acceleration of 0.5 m//s^(2) . If its initial velocity is 20 m//s , find its velocity after 6 seconds.

An electron travelling with a speed of 5x 10^3 m/s passes through an electric field with an acceleration of 10^12 m/s^2 . How long will it take for electron to double its speed?

A man of mass 80 kg stands in an elevator. Calculate his apparent weight when, (iii) downwards with 2 m//s^2 acceleration

A particle moves in a circle with constant speed of 15 m//s . The radius of the circle is 2 m. Determine the centripetal acceleration of the particle.

A simple pendulum of length 1 m is freely suspended from the ceiling of an elevator. The time period of small oscillations as the elevator moves up with an acceleration of 2m//s^2 is (use g=10 m//s^2 )

A body of mass 5 kg moves with an acceleration of 4 m/s^(2) in a straight line. What will be the change in its momentum in 2 seconds?

A particle moves in a circle with constant speed of 15 m/s. The radius of the circle is 2 m. Determine the centripetal acceleration of the particle.

CHETANA PUBLICATION-LAWS OF MOTION -EXERCISE
  1. Two bodies of masses 2 kg and 4 kg are connected at the two ends of a ...

    Text Solution

    |

  2. Ten identical masses (m each) are connected one below the other wih 10...

    Text Solution

    |

  3. A person of mass 60 kg stands on a weighing scale in a lift (elevator)...

    Text Solution

    |

  4. A liquid drop of mass 1 g falls from a cliff 1 km high. It hits the gr...

    Text Solution

    |

  5. A truck of mass 5 tons is travelling on a horizontal road with 36 km h...

    Text Solution

    |

  6. A lighter object A and a heavier object B are initially at rest. Both ...

    Text Solution

    |

  7. Power is rate of doing work or the rate at which energy is supplied to...

    Text Solution

    |

  8. Variation of a force in certain region is given by F= 6x^2 - 4x - 8. I...

    Text Solution

    |

  9. While decreasing linearly from 5 N to 3 N, a force displaces an object...

    Text Solution

    |

  10. 40000 liters of oil of density 0.9 gram per cc is pumped from an oil t...

    Text Solution

    |

  11. Define and explain. (i) Elastic collision.

    Text Solution

    |

  12. Define coefficient of restitution and obtain its value for an elastic ...

    Text Solution

    |

  13. Derive an expression for the velocities of the colliding bodies after ...

    Text Solution

    |

  14. Discus the folwing as special cases of elastic collision and obtain th...

    Text Solution

    |

  15. A bullet of mass m1 travelling with a velocity u strikes a stationary ...

    Text Solution

    |

  16. Explain non head on collision i.e. collision in two dimensions?

    Text Solution

    |

  17. A marble of mass 2m travelling at 6 cm//s is directly followed by anoo...

    Text Solution

    |

  18. Two bodies of masses m and 2m, moving with initial velocities 50 m//s ...

    Text Solution

    |

  19. A bodyof mass 2 kg moves at speed of 4 m//s and makes head on collisio...

    Text Solution

    |

  20. A body of mass 0.5 kg moving with a velocity of 6 m//s collides with a...

    Text Solution

    |