Home
Class 9
PHYSICS
How much work is required for a 74Kg spr...

How much work is required for a 74Kg sprinter to acclerate from rest to 2.2 m//s?

Text Solution

Verified by Experts

Since `u = 0. W = (1)/(2) m upsilon^2 = (1)/(2) (74 kg) (2.2m//s)^2 = 179J`
Promotional Banner

Topper's Solved these Questions

  • WORK AND ENERGY

    PRADEEP|Exercise Assessment Through paper pen Test|30 Videos

  • WORK AND ENERGY

    PRADEEP|Exercise Continuous Assessment I oral testing|10 Videos

  • WORK AND ENERGY

    PRADEEP|Exercise Problems for Practice|30 Videos

  • SOUND

    PRADEEP|Exercise Model Test (sec - B)|12 Videos

Similar Questions

Explore conceptually related problems

How much work is required to carry a 6muC charge from the negative terminal to the positive terminal of a 9 V battery?

The energy required to accelerate a car from 10 m/s to 20 m / s is how many times the energy required to accelerate the car from rest to 10 m /s

" 10kg mass rests on a horizontal frictionless table.How much energy (in Joule) Is needed to accelerate the mass from rest to a speed of 5m/s? "

A particle of mass 0.5kg travels in a straight line with a velocity v=(5x^(5//2))m//s . How much work is done by the net force during the displacement from x=0 to x=2m ?

A car weighing 500 kg moving against a resistance of 500 N, accelerates from rest to 20 m//s in 100m (g = 10m//s^2). The work done by the engine of the car is :

PRADEEP-WORK AND ENERGY-Continuous Assessment
  1. Compare the kinetic energies of two idential objects A and B when velo...

    Text Solution

    |

  2. A fountain of water shoots high in air. What probvides the force that ...

    Text Solution

    |

  3. What is meant by kinetic energy?

    Text Solution

    |

  4. What do you mean by dissipation of energy ?

    Text Solution

    |

  5. What is 1 MJ ?

    Text Solution

    |

  6. What is the origin of the word "kinetic"?

    Text Solution

    |

  7. (a) Which quantity provides a link between force and energy ? (b) ...

    Text Solution

    |

  8. (a) What is the cause of kinetic energy possessed by a body? (b) can...

    Text Solution

    |

  9. (a) Compare the kinetic energies of two identical bodies, one moving n...

    Text Solution

    |

  10. (a) Which of the following does the most work : a force of 3N acting t...

    Text Solution

    |

  11. (a) How is the energy of an object measured? (b) What does work - en...

    Text Solution

    |

  12. When is the work done by gravity negative ?

    Text Solution

    |

  13. What happens when a body performs work?

    Text Solution

    |

  14. How can you visualize a joule of energy ?

    Text Solution

    |

  15. An object has velocity toward south if a force is directed toward the ...

    Text Solution

    |

  16. Two objects have different masses but the same kinetic energy. If you ...

    Text Solution

    |

  17. A person pushes a 72 kg patient on a 15 kg trolley, producing an accel...

    Text Solution

    |

  18. A truck moving at 15m//s has KE of 4.2xx10^5 J (a) what is the mass of...

    Text Solution

    |

  19. How much work is required for a 74Kg sprinter to acclerate from rest t...

    Text Solution

    |

  20. A woman lifts a box weighing 40N from the floor to a shelf 1.5 m above...

    Text Solution

    |