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In a harbour , wind is blowing at the sp...

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?

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The correct Answer is:
East (approcimately)
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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 ?

When you are standstill holding a flag, the flag flutters in the direction of wind. When you start running the direction of fluttering of the flag changes to the direction of the wind relative to you. In all case a flag flutters in the direction of the wind relative to the flag. Winds is blowing uniformly due north everywhere with velocity 12 m/s. A car mounted with a flag starts running towards cast. after 9s from starts the flag flutters in 53^(@) north of west and after 16 s from the start the flag flutters in 37^(@) north of west. (a) Find velocity of the car 9 s after it starts. (b) Find velocity of the car 16 s after it starts. (c) If the car maintains uniform acceleration, find acceleration of the car.

A horse runs along a circle with a speed of 20k m//h . A lantern is at the centre of the circle. A fence is along the tangent to the circle at the point at which the horse starts. Find the speed with which the shadow of the horse moves along the fence at the moment when it covers 1/8 of the circle in km/h.

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:

Two trains start from the same place. A person travel in a train whose speed is 50 km/h and it go to south direction. Another person travel in another train whose speed is 60 km/h and it go to west direction. After two hours, find the rate of distance between them.

A bird is tossing (flying to and fro) between two cars moving towards each other on a straight road. One car has a speed of 18 km/h while the other has the speed of 27 km/h. The bird starts moving from first car towards the other and is moving with the speed of 36 km/h and when the two cars were separated by 36 km. What is the total distance covered by the bird?

A cyclist is riding with a speed of 27 km /h . As he approaches a circular turn on the road of radius 80 m , he applies brakes and reduces his speed at the constant rate of 0.50m//s every second . What is the magnitude and direction of the net acceleration of the cyclist on the circular turn ?

A boat has a velocity 4m//s towards east with respect to river is flowing north with velocity 2m//s Wind is blowing towards north with velocity 6m//s . The direction of the flag blown over by the wind hoisted on the boat is :

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 person going away from a factory on his scooter at a speed of 36 km/hr listens to the siren of the factory. If the actual frequency of the siren is 700 Hz and a wind is blowing along the direction of the scooter at 36 km//hr, find the observed frequency heard by the person. (Given speed of sound = 340 m//s )

NCERT GUJARATI-MOTION IN A PLANE-EXCERCISES
  1. Rain is falling vertically with a speed of 30 ms^(-1) . A woman rides ...

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  2. A man can swim with a speed of 4.0 km/h in still water . How long doe...

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  3. In a harbour , wind is blowing at the speed of 72 km/h and the flag on...

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  4. The celling of a long hall is 25 m high What is the maximum horizontal...

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  5. A cricketer can throw a ball to a maximum horizontal distance of 100 m...

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  6. A stone tied to the end of astring 80 cm long is whirled in a horizon...

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  7. An aircraft executes a horizontal loop of radius 1.00 km with a steady...

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  8. Read each statement below carefully and state , with reasons , if it i...

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  9. The position of a particle is given by r=3.0hati-2.0t^(2)hatj+4.0...

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  10. A particle starts from the origin at t=0 s with a velocity of 10.0hatj...

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  11. hatiandhatj are unit vectors along x - and y- axis respectively . What...

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  12. For any arbitrary motion in space , which of the following relations a...

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  13. Read each statement below acrefully and state , with reasons and exam...

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  14. An aircraft is flying at a height of 3400 m above the ground . If th...

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  15. A very has magnitude and direction . Does it have a location in space...

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  16. A vector has both magnitude and direaction . Does it mean that anythin...

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  17. Can you associate vectors with (a) the length of a wire bent into a lo...

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  18. A bullet fired at an angle of 30^(@) with the horizontal hits the grou...

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  19. A fighter plane flying horizontally at an altitude of 1.5 km with spe...

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  20. A cyclist is riding with a speed of 27 km /h . As he approaches a circ...

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