Home
Class 11
PHYSICS
Two swimmers A and B start swimming from...

Two swimmers `A` and `B` start swimming from different positions on the same bank as shown in figure.The swimmer `A` swims at angle `90^(@)` with respect to the river to reach point `P`.He takes `120 seconds` to cross the river of width `10m`.The swimmer `B` also takes the same time to reach the point `P`

A

velocity of `A` with respect to river is `1//6 m//s`

B

river flow velocity is `1//4 m//s`

C

Velocity of `B` along `y`-axis with respect to earth is `1//3 m//s`.

D

Velocity of `B` along `x`-axis with respect to earth is `5//24 m//s`.

Text Solution

Verified by Experts

The correct Answer is:
B, D
Drift - A : `V_(r)xxtrArr 30=V_(r)xx120`
`V_(r)=1//4m//s`
Drift B : `25=(v_(r)-v_(br))xx t , v_(br)=5/24m//sec`
Promotional Banner

Topper's Solved these Questions

  • MOTION IN A PLANE

    NARAYNA|Exercise Level-VI Passage answer|18 Videos

  • MOTION IN A PLANE

    NARAYNA|Exercise Level-Vi Integer|9 Videos

  • MOTION IN A PLANE

    NARAYNA|Exercise Level-Vi single answer|30 Videos

  • MECHANICAL PROPERTIES OF SOLIDS

    NARAYNA|Exercise LEVEL-II (H.W)|24 Videos

  • MOTION IN A STRAIGHT LINE

    NARAYNA|Exercise Level 2 H.W|29 Videos

Similar Questions

Explore conceptually related problems

Two swimmers P and Q start swimming from different positions on the same bank as shown in the figure. The swimmer P swims at an angle 90^(@) with respect to the river to reach point A. He takes 120 second to cross the river of width 10m. The swimmer Q also takes the same time to reach the point A. the velocity component of Q along x-axis with respect to ground is K/24. Find the value of K.

A swimmer crosses the river along the line making an angle of 45^(@) with the direction of flow. Velocity of the river is 5 m/s. Swimmer takes 6 seconds to cross the river of width 60 m. The velocity of the swimmer with respect to water will be :

A swimmer crosses the river along the line making an angle of 45^@ with the direction of flow. Velocity of the river water is 5(m)/(s) . Swimmer takes 12 seconds to cross the river of width 60 m. The velocity of the swimmer with respect to water will be:

A person, reaches a point directly opposite on the other bank of a flowing river, while swimming at a speed of 5 m/s at an angle of 120^(@) with the flow. The speed of the flow must be

A swimmer starts to swim from point a to cross a river. He wants to reach point B on the opposite side of the river. The line AB makes an angle 60^(@) with the river flow as shown. The velocity of the swimmer in still water is same as that of the water (i) In what direction should he try to direct his velocity ? Calculate angle between his velocity ? Calculate angle between his velocity and river velocity. (ii) Find the ratio of the time taken to cross the river in this situation to the minimum time in which he can cross this river.

A swimmer wants to cross a river from point A to point B. Line AB makes an angle of 30^(@) with the flow of river. Magnitude of velocity of the swimmer is same as that of the river. The angle theta with the line AB should be _________ ""^(@) , so that the swimmer reaches point B.

A swimmer wishes to reach directly opposite bank of a river, flowing with velocity 8 m/s. The swimmer can swim 10 m/s still water. The width of the river is 480 m. Time taken by him to do so:

A swimmer crosses a river of width d flowing at velocity v. While swimming, he keeps himself always at an angle of 120^(@) with the river flow and on reaching the other end. He finds a drift of d/2 in the direction of flow of river. The speed of the swimmer with respect to the river is :

Two swimmers start at the same time from point A one bank of a river to reach point B on the other bank, lying directly oppostie to point A. one of them crosses the river along the straight line AB, while the other swims at right angles to the stream and then walks the distance, which he has been carried awayby the stream to get to point B. Both swimmers reach point B at the same time. what was the velocity (assumed uniform) of his walking if velocity of both the swimmers in still water is 2.5 km h^(-1) and the stream velocity is 2 km h^(-1) ?

NARAYNA-MOTION IN A PLANE-Level-Vi multiple answer
  1. A child in danger of drowning in a river is being carried downstream b...

    Text Solution

    |

  2. A launch plies between two points A and B on the opposite banks of a r...

    Text Solution

    |

  3. The current velocity of river grows in proportion to the distance from...

    Text Solution

    |

  4. Two swimmers A and B start swimming from different positions on the sa...

    Text Solution

    |

  5. Two frames of reference P and Q are moving relative to each other at c...

    Text Solution

    |

  6. Two swimmers start a race. One who reaches the point C first on the ot...

    Text Solution

    |

  7. Two trains A and B are moving with same speed of 100km//hr.Train A mov...

    Text Solution

    |

  8. Two shells are fired from cannon with speed u each, at angles of alpha...

    Text Solution

    |

  9. Two inclined planes OA and OB having inclination (with horizontal) 30^...

    Text Solution

    |

  10. Two balls are thrown from an inclined plane at angle of projection alp...

    Text Solution

    |

  11. An aeroplane at a constant speed releases a bomb.As the bomb drops awa...

    Text Solution

    |

  12. Two particles are projected with speed 4m//s and 3m//s simultaneously ...

    Text Solution

    |

  13. A particle moves along x-axis with constant acceleration and its x-pos...

    Text Solution

    |

  14. A railway compartments is 16 m long, 2.4 m wide and 3.2 m high. It is ...

    Text Solution

    |

  15. Two particles A and B are projected from the same point with the same ...

    Text Solution

    |

  16. Two particles are projected from the same point, with the same speed, ...

    Text Solution

    |