Home
Class 11
PHYSICS
A trolley of mass 200 kg moves with a un...

A trolley of mass 200 kg moves with a uniform speed of `36 km//h` on a frictionless track. A child of mass 20 kg runs on the trolley from one end to the other (10 m away) with a speed of `4 m s^-1` relative to the trolley in a direction opposite to the its motion, and jumps out of the trolley. What is the final speed of the trolley ? How much has the trolley moved from the time the child begins to run ?

Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

A trolley of mass 300 kg carrying a sandbag of 25 kg is moving uniformly with a speed of 27 km//h on a frictionless track. After a while, sand starts leaking out of a hole on the floor of the trolley at the rate of 0.05 kg s^-1 . What is the speed of the trolley after the entire sand bag is empty ?

A car is moving with a speed of 54 km//h . What will be the kinetic energy of the boy of mass 40 kg sitting in the car ?

A child sits stationary at one end of a long trolley moving uniformly with a speed V on a smooth horizontal floor. If the child gets up and runs about on the trolley in any manner, what is the speed of the CM of the (trolley + child) system ?

A boy of mass 18 kg is running with a speed of 12 km/h. Find the kinetic energy possessed by the boy.

A machine gun of mass 20 kg fires 35 gram bullet at the rate of 50 bullets per second with a speed of 400 m s^-1 . What force must be applied to the gun to keep it in position?

A man of mass 70 kg stands on a weighing scale in a lift which is moving :- upwards with a uniform speed of 10 m s^-1 , what would be the reading on scale?

A bullet of mass 20 g moving with a speed of 500ms^(-1 ) strikes a wooden block of mass 1 kg and gets embedded in it. Find the speed with which block moves along with the bullet.

MBD-WORK, ENERGY AND POWER-EXAMPLE
  1. A 1 kg block situated on a rough incline is connected to a spring of s...

    Text Solution

    |

  2. A bolt of mass 0.3 kg falls from the ceiling of an elevator moving dow...

    Text Solution

    |

  3. A trolley of mass 200 kg moves with a uniform speed of 36 km//h on a f...

    Text Solution

    |

  4. Which of the following potential energy curves in Fig. 6.18 cannot pos...

    Text Solution

    |

  5. Consider the decay of the free neutron at rest: n = p + e^-. Show ...

    Text Solution

    |

  6. An electron and a proton are moving under the influence of mutual forc...

    Text Solution

    |

  7. A proton is kept at rest. A positively charged particle is released fr...

    Text Solution

    |

  8. A man squatting on the ground gets straight up and stand. The force of...

    Text Solution

    |

  9. A bicylist comes to a skidding stop in 10 m. During this process, the ...

    Text Solution

    |

  10. A body is falling freely under the action of gravity alone in vacuum. ...

    Text Solution

    |

  11. During inelastic collision between two bodies, which of the following ...

    Text Solution

    |

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

    Text Solution

    |

  13. The potential energy function for a particle executing linear simple h...

    Text Solution

    |

  14. Two identical ball bearing in contact with each other and resting on a...

    Text Solution

    |

  15. A body of mass 0.5 kg travels in a straight line with velocity v=a x(3...

    Text Solution

    |

  16. A body is moving unidirectionally under the influence of a source of c...

    Text Solution

    |

  17. Which of the diagrams show in figure most closely shows the variation ...

    Text Solution

    |

  18. Which of the following represents electronic configuration of alkali m...

    Text Solution

    |

  19. A mass of 5 kg is moving along a circular path of radius 1 m. If the m...

    Text Solution

    |

  20. A raindrop of mass 1.00 g falling form a height of 1 km hits the groun...

    Text Solution

    |