Home
Class 12
PHYSICS
If a man of ,mass M jumps to the ground...

If a man of ,mass M jumps to the ground from a height h and his centre of mass moves a distance x in the time taken by him to 'hit' the ground the average force acting on him (assuming his retardation to be constant during his impact with the ground) is :

A

`(Mgh)/(x)`

B

`(Mgx)/(h)`

C

`Mg((h)/(x))^(2)`

D

`Mg((x)/(h))^(2)`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • NTA JEE MOCK TEST 31

    NTA MOCK TESTS|Exercise PHYSICS|25 Videos

  • NTA JEE MOCK TEST 33

    NTA MOCK TESTS|Exercise PHYSICS|25 Videos

Similar Questions

Explore conceptually related problems

If a man of mass M jumps to the ground from a height h and centre of mass moves a distance x in time taken by him to hit the ground, show that the average force acting on him is Mgh//x .

A ball is thrown upwards with a speed u from a height h above the ground.The time taken by the ball to hit the ground is

A stone is released from the top of a tower of height 1960 m. calculate the time taken by the stone to hit the ground.

Body A of mass M is dropped from a height of 1 m and body. B of mass 3M is dropped from a height of 9 m. The ratio of time taken by the bodies 1 and 2 to reach the ground is

A ball of mass m falls vertically to the ground from a height h_1 and rebound to a height h_1 and rebound to a height h_2 . The change in momentum of the ball on striking the ground is.

A man travels 100 in 5 h. If he increases his speed by 5 km/h, then find the time taken by him to travel the same distance.

A hainmer of mass Mkg falls from a height h meter upon the top of an inelastic pile of mass m kg and drive it into the groung a sistance x meter. Find the resistance of the ground ehen it is assumed to be constant. Find also the time during which the lile is in motion and the kinetic energy lost at the impact.

A man whose mass is m kg jumps vertically into air from the sitting position in which his centre of mass is at a height h_(1) from the ground. When his feet are just about to leave the ground his centre of mass is at height h_(2) from the ground and finally centre of mass rises to h_(3) above the ground when he is at the top of the jump. what is the average upward force exerted by the ground on him?

A hammer of mass M falls from height h to drive a pile of mass m into the ground. The hammer makes the pile pentrate in the ground to a distance d, opposition force of penetration is given by -

NTA MOCK TESTS-NTA JEE MOCK TEST 32-PHYSICS
  1. Consider a thin metallic sheet perpendicular to the plane of the paper...

    Text Solution

    |

  2. The electric potential at a space point P (X, Y, Z) is given as V= x^(...

    Text Solution

    |

  3. g(e) and g(p) denote the acceleration due to gravity on the surface of...

    Text Solution

    |

  4. One mole of an ideal monoatomic gas undergoes a cyclic process, as sho...

    Text Solution

    |

  5. The strength of the magnetic field at a point r near a long straight c...

    Text Solution

    |

  6. The block are of mass 2 kg shown is in equlibrium. At t=0 right spring...

    Text Solution

    |

  7. The circuit shown in the figure determine the current through zener di...

    Text Solution

    |

  8. Water is flowing through a channel that is 12 m wide with a speed of 0...

    Text Solution

    |

  9. There is no change in the volume of a wire due to the change in its le...

    Text Solution

    |

  10. A linear object is placed along the axis of a mirror as shown in figur...

    Text Solution

    |

  11. Radar waves are sent towards a moving aeroplane and the reflected wave...

    Text Solution

    |

  12. In a p- n junction diode not connected to any circuit,

    Text Solution

    |

  13. If masses of all molecules of a gas are halved and the speed doubled. ...

    Text Solution

    |

  14. A screw gauge with a pitch of 0.5mm and a circular scale with 50 divis...

    Text Solution

    |

  15. If a man of ,mass M jumps to the ground from a height h and his centr...

    Text Solution

    |

  16. In the given circuit, initially switch S(1) is closed, and S(2) and S(...

    Text Solution

    |

  17. Two blocks P and Q of masses 0.3 kg and 0.4 kg respectively are stuck ...

    Text Solution

    |

  18. A lamina is made by removing a small disc of diameter 2R from a bigg...

    Text Solution

    |

  19. A conducting ring of circular cross - section with inner and outer rad...

    Text Solution

    |

  20. Earth is moving towards a fixed star with a velocity of 30 kms^(-1). A...

    Text Solution

    |