Home
Class 12
PHYSICS
A man rows a boat with a speed of 18 km/...

A man rows a boat with a speed of 18 km/hr in northwest direction. The shoeline makes an angle of `15^(@)` south of west. Obtain the component of the velocity of the boat along the shoreline:

A

9 km/hr

B

`18(sqrt(3))/(2) km//hr`

C

`18 cos (15^(@)) km//hr`

D

`18 cos (75^(@)) km//hr`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • UNIT & DIMENSIONS, BASIC MATHS AND VECTOR

    ALLEN |Exercise Exercise (O-2) Multiple Correct Type Questions.|7 Videos

  • UNIT & DIMENSIONS, BASIC MATHS AND VECTOR

    ALLEN |Exercise Exercise (O-2) Comprehension Type Questions.|9 Videos

  • UNIT & DIMENSIONS, BASIC MATHS AND VECTOR

    ALLEN |Exercise Exercise (O-1) Matrix match type Questions.|3 Videos

  • TEST PAPERS

    ALLEN |Exercise MATHS|1 Videos

  • WAVE OPTICS

    ALLEN |Exercise Exercise 2 (Previous Year Questions)|7 Videos

Similar Questions

Explore conceptually related problems

A motorboay is racing towards north at 25 km/h and the water current in that region is 10km/h in the direction of 60^(@) east of south . Find the resultant velocity of the boat.

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 bird is flying with a speed of 40 km/hr. in the north direction. A train is moving with a speed of 40km/hr. in the west direction. A passenger sitting in the train will see the bird moving with velocity:-

A train moves in north direction with a speed of 54 km/hr. and a monkey running on the roof of the train, against its motion with a velocity of 18km/hr. with respect to the train, then the velocity of monkey as observed by a man standing on the ground:-

A boat which has a speed of 5 km per hour in still water crosses a river of width 1 km along the shortest possible path in fifteen minutes. The velocity of the river water in km per hour is :-

In a harbour , wind is blowing at the speed of 72 km/h and the flag on the mast of a boat anchored in the harbour flutters along the N- E direction . If the boat starts moving at a speed of 51 km/h to the north , what is the direction of the flag on the mast of the boat?

In a harbour, wind is blowing at the speed of 72 km //h and the flag on the mast of a boat anchored in the harbour flutters along the N-E direction . If the boat starts moving at a speed of 51 km// h to the North, what is the direction of flag on the mast of the bat ?

Man A is sitting in a car moving with a speed of 54 (km)/(hr) observes a man B in front of the car crossing perpendicularly a road of width 15 m in three seconds. Then the velocity of man B (in (m)/(s) ) will be:

In the figure there is a long horizontal bridge over a river 75 m high from water surface. A strong man throws a stone in the parallel plane of the bridge. A observer in a car travelling on the bridge finds the stone going pass by the car while ascending and also while descending between two points on the road 30 m away. The car is travelling at a speed of 15 m/s. The stone is thrown from the bank of river just at the same level of water. What is the angle the velocity makes with the bridge when it goes past the car while ascending ?

A river 2 km wide is flowing at the rate of 2km/hr. A boatman, can row the boat at a speed of 4 km/hr in still water, goes a distance of 2 km upstream and them comes back. The time taken by him to complete his journey is

ALLEN -UNIT & DIMENSIONS, BASIC MATHS AND VECTOR -Exercise (O-2) Single Correct Type Questions.
  1. In a certain system of units, 1 unit of time is 5 sec, 1 unit of mass ...

    Text Solution

    |

  2. If the unit of length be doubled then the numerical value of the unive...

    Text Solution

    |

  3. If in a system the force of attraction between two point masses of 1kg...

    Text Solution

    |

  4. In two different system of unit an acceleration is represented by the ...

    Text Solution

    |

  5. Statement-I : Whenever we change the unit of measurement of a quantity...

    Text Solution

    |

  6. Forces proportional to AB, BC & 2 CA act along the sides of triangle A...

    Text Solution

    |

  7. A man rows a boat with a speed of 18 km/hr in northwest direction. The...

    Text Solution

    |

  8. Statement 1: Unit vector has a unit though its magnitude is one and...

    Text Solution

    |

  9. A vector of magnitude 10m in the direction 37^(@) south of west has it...

    Text Solution

    |

  10. A plumber steps down 1 m out of his truck and walks 50m east and then ...

    Text Solution

    |

  11. A body moves in anticlockwise direction on a circular path in the x-y ...

    Text Solution

    |

  12. A body A is standing 20sqrt(3) m away in a direction 30^(@) north of e...

    Text Solution

    |

  13. Find the component of vecr in the directioln of veca :-

    Text Solution

    |

  14. Consider three vectors A=hati +hatj-2hatk, B=hati +hatj+2hatk and C=...

    Text Solution

    |

  15. A string connected with bob is suspended by the point (O) such that it...

    Text Solution

    |

  16. x- component of a vector vecA is twice of its y-component and sqrt(2) ...

    Text Solution

    |

  17. Given the vector vecA=2hati+3hatj-hatk, vecB=3hati-2hatj-2hatk & vecC=...

    Text Solution

    |