Home
Class 11
PHYSICS
A body of mass 10 kg at a height 200 m f...

A body of mass 10 kg at a height 200 m falls freely. Calculate the kinetic energy with which it strikes the ground. What will be the linear momentum of the body? With what velocity will it strike the ground?

Text Solution

Verified by Experts

`m=10kg,h=200m`,
`P.E. = mgh=10xx9.8xx210=1.96xx10^(4)J`
Linear momentum = `v=sqrt(2mE)=sqrt(2xx10xx1.96xx10^(4))=6.26xx10^(2)kgms^(-1)`
Velocity `v=sqrt(2gh)=sqrt(2xx9.8xx200)=62.6ms^(-1)`.
Promotional Banner

Topper's Solved these Questions

  • WORK, POWER AND ENERGY

    SUBHASH PUBLICATION|Exercise FIVE MARKS QUESTIONS AND ANSWERS|6 Videos

  • WAVES

    SUBHASH PUBLICATION|Exercise NUMERICALS WITH SOLUTIONS|46 Videos

Similar Questions

Explore conceptually related problems

What is the momentum of an object of mass m, moving with a velocity v ?

A body falls freely. What is constant?

A stone is thrown vertically upwards with a velocity of 20ms^(-1) from the top of a tower 96 m high. After what time will it reach the foot of the tower ? What will be the velocity of the stone reaching the point of projection? At what velocity will it strike the ground ? (g=9.8 ms^(-2))

In an athletic-meet an athlete has to throw a shot put with mass 10 kg with an initial velocity 1 ms at an angle 45^(@) with the horizontal from a platform 1.5 m above the ground. What will be the kinetic energy of this shot put when it just strikes the ground. Assume the air resistance to be negligible and take the value of 'g' to be 10 ms?

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

A body of mass m at rest is subjected to a constant force F for time. The kinetic energy at timet is given by :

Two bodies of masses 1 kg and 2 kg have equal momentum. Then, the ratio of their kinetic energies is

SUBHASH PUBLICATION-WORK, POWER AND ENERGY -NUMERICALS WITH SOLUTIONS
  1. A turbine generates 1.64 MW. Assuming the efficiency to be 80% and hea...

    Text Solution

    |

  2. A steam turbine shovel lifts 10^(3) kg of earth to a height of 3.75 m ...

    Text Solution

    |

  3. The makers of a certain motor car state that if the brakes are applied...

    Text Solution

    |

  4. A machine gun fires 25 bullets of mass 0.1 kg each, per minute. If the...

    Text Solution

    |

  5. A cloud of thickness 10 m and area 10^(6)m^(2) is formed at a height o...

    Text Solution

    |

  6. A body of mass 10 kg at a height 200 m falls freely. Calculate the kin...

    Text Solution

    |

  7. A cart is used to lower vertically, a block of mass 10 kg over a dista...

    Text Solution

    |

  8. A body of mass 5 kg, initially at rest, moves under the action of an a...

    Text Solution

    |

  9. The blades of a windmill sweep out a circle of area 30m^(2). If the wi...

    Text Solution

    |

  10. A block of wood of mass 0.5 kg is suspended by means of a thin wire. A...

    Text Solution

    |

  11. In the figure show below, calculate the coefficient of friction betwee...

    Text Solution

    |

  12. A bullet of mass 0.012 kg and horizontal speed 70ms^(-1) strikes a blo...

    Text Solution

    |

  13. The bob of a pendulum is released from a horizontal position. If the l...

    Text Solution

    |

  14. A person trying to lose weight lifts a 10 kg mass, one thousand times,...

    Text Solution

    |

  15. A person trying to lose weight lifts a 10 kg mass, one thousand times,...

    Text Solution

    |

  16. The blades of a windmill sweep out a circle of area 30m^(2). If the wi...

    Text Solution

    |

  17. The blades of a windmill sweep out a circle of area A. If the wind ...

    Text Solution

    |

  18. The blades of a windmill sweep out a circle of area 30m^(2). If the wi...

    Text Solution

    |

  19. Two inclined frictionless tracks, one gradual and the other steep meet...

    Text Solution

    |

  20. A particle moves along the x-axis from x=0 to x=5m under the influence...

    Text Solution

    |