Home
Class 9
PHYSICS
A body of 2 kg falls from rest. What wil...

A body of 2 kg falls from rest. What will be its kinetic energy during the fall at the end of 2 s ? (Assume `g = 10 m//s^(2)`)

A

100 J

B

0 J

C

200 J

D

400 J

Text Solution

Verified by Experts

The correct Answer is:
D

NA
Promotional Banner

Topper's Solved these Questions

  • WORK AND ENERGY

    LAKHMIR SINGH & MANJIT KAUR|Exercise Long Answer Type Questions|2 Videos
  • WORK AND ENERGY

    LAKHMIR SINGH & MANJIT KAUR|Exercise Multiple Choice Questions|1 Videos
  • WORK AND ENERGY

    LAKHMIR SINGH & MANJIT KAUR|Exercise Multiple Choice Questions|1 Videos
  • SOUND

    LAKHMIR SINGH & MANJIT KAUR|Exercise Value Based Questions|20 Videos

Similar Questions

Explore conceptually related problems

A body of mass 2 kg is thrown vertically upwards with an initial velocity of 20 m/s. What will be its potential energy at the end of 2 s ? (Assume g = 10 m//s^(2) ).

A ball of mass 200 g falls from a height 5 metres. What is its kinetic energy when it just reaches the ground ? ( g = 9.8 m//s^(2) ).

A body of mass 1 kg is rotating in a verticle circle of radius 1 m .What will be the difference in its kinetic energy at the top and bottom of the circle ? (g=10m//s^(2))

What is the kinetic energy of a body of mass 1 kg moving with a speed of 2 m/s ?

A body of mass 5 kg initially at rest is subject to a force of 20 N. What is the kinetic energy acquired by the body at the end of 10 s ?

A ball falls on the ground from a height of 10m and rebounds to a height of 8m. What is the percentage loss kinetic energy of the ball? (g=10m//s^(2))

A body of mass 2 kg is at rest. What should be the magnitude of force which will make the body move with a speed of 30 m/s at the end of 1 s?

A lifting machine, having an efficiency of 80 % uses 2500 J of energy in lifting a 10 kg load over a certain height. If the load is now allowed to fall through that height freely, its velocity at the end of the fall will be (g =10 m//s^(2))

LAKHMIR SINGH & MANJIT KAUR-WORK AND ENERGY-Exercise
  1. Find the momentum of a body of mass 100 g having a kinetic energy of 2...

    Text Solution

    |

  2. Two objects having equal masses are moving with uniform velocities of ...

    Text Solution

    |

  3. A body of 2 kg falls from rest. What will be its kinetic energy during...

    Text Solution

    |

  4. On a level road, a scooterist applies brakes to slow down from a speed...

    Text Solution

    |

  5. A man drops a 10 kg rock from the top of a 5 m ladder. What is its spe...

    Text Solution

    |

  6. Calculate the work done by the brakes of a car of mass 1000 kg when it...

    Text Solution

    |

  7. A body of mass 100 kg is lifted up by 10 m. Find : (i) the amount of...

    Text Solution

    |

  8. A boy weighing 50 kg climbs up a vertical height of 100 m. Calculate t...

    Text Solution

    |

  9. What is the work done by a constant force ? When is it positive, negat...

    Text Solution

    |

  10. To what height should a box of mass 150 kg be lifted, so that its pote...

    Text Solution

    |

  11. A body of mass 2 kg is thrown vertically upwards with an initial veloc...

    Text Solution

    |

  12. How much work is done when a force of 1 N moves a body through a dista...

    Text Solution

    |

  13. A car is being driven by a force of 2.5 xx 10^(10) N. Travelling at a...

    Text Solution

    |

  14. Explain by a an example that a body may possess energy when it is not ...

    Text Solution

    |

  15. (a) On what factors does the gravitational potential energy of a body ...

    Text Solution

    |

  16. Give two examples where a body possesses both , kinetic energy as well...

    Text Solution

    |

  17. How much is the mass of a man if he has to do 2500 joules of work in c...

    Text Solution

    |

  18. If the work done by a force in moving an object through a distance of ...

    Text Solution

    |

  19. A boy weighing 40 kg makes a high jump of 1.5 m. (i) What is his kin...

    Text Solution

    |

  20. What type of energy is possessed : (a) by the stretched rubber strin...

    Text Solution

    |