Home
Class 12
PHYSICS
A boat man could row his boat with a spe...

A boat man could row his boat with a speed 10 m/sec. He wants to take his boat from P to a point Q just opposite on the other bank of the river flowing at a speed 4 m/sec. He should row his boat–

A

at an angle of `sin^(-1) `(3/5) up the stream

B

at an angle of `sin ^(-1) `(2/5) up the stream

C

at an angle of `sin ^(-1) `( 2/5) down the stream

D

at an angle of `cos ^(-1) (2/5) down the stream

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • MOTION IN A STRAIGHT LINE & PLANE

    VMC MODULES ENGLISH|Exercise EFFICIENT|50 Videos

  • MOTION IN A STRAIGHT LINE & PLANE

    VMC MODULES ENGLISH|Exercise IMPECCABLE|52 Videos

  • MOTION IN A STRAIGHT LINE & PLANE

    VMC MODULES ENGLISH|Exercise IMPECCABLE|52 Videos

  • MOCK TEST 9

    VMC MODULES ENGLISH|Exercise PHYSICS (SECTION 2)|5 Videos

  • Motion in Straight Line

    VMC MODULES ENGLISH|Exercise IN-CHAPTER EXERCISE-J|10 Videos

Similar Questions

Explore conceptually related problems

A man can swim in still water at a speed of 6 kmph and he has to cross the river and reach just opposite point on the other bank. If the river is flowing at a speed of 3 kmph, he has to swim in the direction

A man can swim in still water at a speed of 6 kmph and he has to cross the river and reach just opposite point on the other bank. If the river is flowing at a speed of 3 kmph, and the width of the river is 2 km, the time taken to cross the river is (in hours)

Width of a river is 30 m, velocity is 4 m//s and rowing velocity is 5 m//s (a) Make the velocity diagram for crossing the river in shortest time. Then, find this shortest time, net velocity of boatman and drigt along the river. (b) Can the boatman reach a point just oppsite on the other shore? If yes then make the velocity diagram, the direction in which the should row his boat and the time taken to cross the river in this case. (c) How long will it iake hom to row 10 m up the stream and then back to his starting point?

A river is flowing from west to east with a speed 5 m//s . A swimmer can swim in still water at a speed of 10 m//s . If he wants to start from point A on south bank and reach opposite point B on north bank. In what direction direction should he swim ?

A boat man can row with a speed of 10 km/hr. in still water. The river flow steadily at 5 km/hr. and the width of the river is 2 km. if the boat man cross the river with reference to minimum distance of approach then time elapsed in rowing the boat will be:-

A man wishes to swim across a river 40 m wide flowing with a speed of 3m/s. such that he reaches the point just infront on the other bank in time not greater than 10s. The angle made by the direction he swims and river flow direction is :-

A river is flowing from west to east at a speed of 5m//s . A man on the south bank of the river capable of swimming at 10m//s in a still water wants to swim, across the river in a shortest time. He should swim in a direction

Given |V_br| = 4 m//s = magnitude of velocity of boatman with respect to river, v_r= 2 m//s in the directior shown. Boatman wants to reach from point A to point B. At what angle theta should he row his boat ?

At a harbour, a boat is standing and wind is blowing at a speed of sqrt(2)m//sec. due to which , the flag on the boat flutters along north - east. Now the boat enters in to river, which is flowing with a velocity of 2m//sec . Due north. The boat starts with zero velocity relative to the river and its constant acceleration relative to the river is 0.2m//sec^(2) due east. In which direction will the flag flutter at 10 seconds ?

A fishing boat is anchored 9 km away from the the nearest point on the shore. A messanger must be sent from the fishing boat to a camp, 15 km from the point on shore closest to boat. If the messanger can walk at a speed of 5 km per hour and can row at 4 km/h. determine the distance of that point (in km) from the shore, where he must land so as to reach the shore in least possible time.

VMC MODULES ENGLISH-MOTION IN A STRAIGHT LINE & PLANE -ENABLE
  1. A bullet is fired from a gun eith a speed of 1000m/s on order to hit t...

    Text Solution

    |

  2. From a tower of height H, a particle is thrown vertically upwards with...

    Text Solution

    |

  3. A bullet losses 1/n of its velocity in passing through a plank. What i...

    Text Solution

    |

  4. The relation between time t and distance x t= ax^(2) +bx is , where a...

    Text Solution

    |

  5. If acceleration a(t) = 3t^(2) and initial velocity u=0 m/s , then the ...

    Text Solution

    |

  6. The velocity of any particle is related with its displacement As, x = ...

    Text Solution

    |

  7. A particle moves in a straight line with retardation proportional to i...

    Text Solution

    |

  8. An object moving with a speed of 6.25 m//s is declerated at a rate g...

    Text Solution

    |

  9. A particle falls from a height h and rebounds to a height h (1) ( h (1...

    Text Solution

    |

  10. The velocity-time plot for a particle moving on a straight line is sh...

    Text Solution

    |

  11. For the displacement-time graph shown in figure, the ratio of the magn...

    Text Solution

    |

  12. The displacement-time graph of a moving object is shown in figure. Whi...

    Text Solution

    |

  13. A particles starts from rest. Its acceleration (a) versus time (t) is ...

    Text Solution

    |

  14. Velocity of boat in still water is 13 m/s. If water flows ina river wi...

    Text Solution

    |

  15. The uniform motion in the following acceleration-time graph is

    Text Solution

    |

  16. The following shows the velocity-timegraphfor a moving object. The max...

    Text Solution

    |

  17. Rain is falling vertically downward with velocity 4 m//s. A man is mov...

    Text Solution

    |

  18. A boat man could row his boat with a speed 10 m/sec. He wants to take ...

    Text Solution

    |

  19. A particle located at x = 0 at time t = 0, starts moving along with t...

    Text Solution

    |

  20. Consider a rubber ball freely falling from a height h = 4.9 m onto a h...

    Text Solution

    |