Home
Class 12
PHYSICS
As shown in the figure, Tarzan travels f...

As shown in the figure, Tarzan travels from one place to another by swinging in the forest. Assume that the rope is just long enough to swing from point `A` to point `B`, what is his initial speed in order for him to reach point `B`?

A

`6ms^(-1)`

B

`4ms^(-1)`

C

`8ms^(-1)`

D

`2ms^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
D
Ans. (4)
By using work energy theorem `W=DeltaKE`
`-mg(0.2)=0-(1)/(2)mv^(2)rArrv=2ms^(-1)`
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

For the shown graph slope of graph from point A to point B :

What is the essential requirements for transmitting a microwave from one point to another on the earth?

Rohan wants to measure the distance of a pond during the visit to his native. He marks points A and B on the opposite edges of a pond as shown in the figure below. To find the distance between the points, he makes a right-angled triangle using rope connecting B with another point C are a distance of 12m, connecting C to point D at a distance of 40m from point C and the connecting D to the point A which is are a distance of 30m from D such the angleDC=90^0 Find the length of the rope used.

Rohan wants to measure the distance of a pond during the visit to his native. He marks points A and B on the opposite edges of a pond as shown in the figure below. To find the distance between the points, he makes a right-angled triangle using rope connecting B with another point C are a distance of 12m, connecting C to point D at a distance of 40m from point C and the connecting D to the point A which is are a distance of 30m from D such the angleDC=90^0 What is the distance AC?

A person starts from a point P and travels along a path PQRS as shown in the figure, then speed of the person is _____ ms^(-1)

Rohan wants to measure the distance of a pond during the visit to his native. He marks points A and B on the opposite edges of a pond as shown in the figure below. To find the distance between the points, he makes a right-angled triangle using rope connecting B with another point C are a distance of 12m, connecting C to point D at a distance of 40m from point C and the connecting D to the point A which is are a distance of 30m from D such the angleDC=90^0 Find the length AB?

Case Study : Suresh wants to measure the distance of a pond during the visit to his native. He marks points A and B on the opposite edges of the pond as shown in the figure below. To find the distance between the points, he makes a right-angled triangle using rope connecting B with another point C are at a distance of 12 m, connecting C to point D at a distance of 40 m from point C and the connecting D to the point A which is at a distance of 30 m from D such that angle ADC=90^(@) Find the length of rope used.

A river is flowing at a speed of 5 km/h in a particular direction. A man, who can swim at a speed of 20 km/h in still water, starts swimming along the direction of flow of the river from point A and reaches another point B which is at a distance of 30 km from the starting point A. On reaching point B, the man turns back and starts swimming against the direction of flow of the river and stops after reaching point A. The total time taken by the man to complete his journey is

ALLEN-TEST PAPER-Exercise (Physics)
  1. Two identical blocks A and B each of weight 20N are placed on a fricti...

    Text Solution

    |

  2. Figure shows an At wood machine in which m(1)+m(2)=M is constant. Now ...

    Text Solution

    |

  3. As shown in the figure, Tarzan travels from one place to another by sw...

    Text Solution

    |

  4. Two equal rods joined at one end are kept on a smooth surface as shown...

    Text Solution

    |

  5. A three part rocket begins intact as a single object in distant outer ...

    Text Solution

    |

  6. A three part rocket begins intact as a single object in distant outer ...

    Text Solution

    |

  7. Five uniform circular plates, each of diameter b and mass m are laid o...

    Text Solution

    |

  8. In the figure, the L-shaped shaded piece is cut from a metal plate of ...

    Text Solution

    |

  9. The centre of mass of a non uniform rod of length L whoose mass per un...

    Text Solution

    |

  10. Find the center of mass(x,y,z) of the following structure of four iden...

    Text Solution

    |

  11. A thick uniform wire is bent into the shape of the letter "U" as shown...

    Text Solution

    |

  12. In the given figure four rods AB,BC,CD and DA have mass m, 2m, 3m and ...

    Text Solution

    |

  13. A uniformly thick plate in the shape of an arrow head has dimensions a...

    Text Solution

    |

  14. An object comprises of a uniform ring of radius R and its uniform chor...

    Text Solution

    |

  15. In a head on collision between two identical particles A and B moving ...

    Text Solution

    |

  16. A machine gun fires 10 bullets per second in horizontal direction. Mas...

    Text Solution

    |

  17. Ball A of mass 1kg moving right with speed 2m//s bounces off ball B o...

    Text Solution

    |

  18. A cricket ball of mass 160g is moving horizontally directly towards a ...

    Text Solution

    |

  19. A particle of mass 4 m which is at rest explodes into masses m, m & 2m...

    Text Solution

    |

  20. Two girls of equal mass m jump off from the border line of a stationar...

    Text Solution

    |