Home
Class 12
PHYSICS
A fish rising up vertically toward the ...

A fish rising up vertically toward the surface of water with speed `3ms^(-1)` observes a bird diving down vertically towards it with speed `9ms^(-1)` . The actual velocity of bird is

A

(a)`4.5 ms^(-1)`

B

(b)`5 m^(-1)`

C

(c)`3.0 ms^(-1)`

D

(d)`3.4 ms^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • RAY OPTICS AND WAVE OPTICS

    VMC MODULES ENGLISH|Exercise IMPECCABLE|58 Videos

  • RAY OPTICS AND WAVE OPTICS

    VMC MODULES ENGLISH|Exercise ENABLE|50 Videos

  • RAY OPTICS

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

  • REVISION TEST-15 JEE - 2020

    VMC MODULES ENGLISH|Exercise PHYSICS|25 Videos

Similar Questions

Explore conceptually related problems

In a lake, a fish rising vertically to the surface of water uniformly at the rate of 3 m/s, observes a bird diving vertically towards the water at the rate of 9 m/s. The actual velocity of the dive of the bird is (given, refractive index of water = 4/3)

A fish rising vertically to the surface of water in a lake uniformly at the rate of 3ms^(-1) observes a bird diving vertically towards the water at a rate of 9ms^(-1) vertically above it. If the refractive index of water is 4/3 the actual velocity of the dive of the bird is (in ms^(-1) )

System is shown in fig. and wedge is moving toward left with speed 2ms^(-1) . Find the velocity of the block B.

A fish is moving up vertically with speed 4 cm/s inside a pond. A bird is moving vertically downward (see figure). Velocity of the bird w.r.t. fish is 16 cm/s downward. Find out the actual velocity of the bird (in cm/s). Given refractive index of water is (4)/(3) .

A fish is rising up veritcally inside a pond with velocity 4 m//s, and notices a bird, which is dividing downward and its velocity appear to be 16 m//s (to fish). What is the real velocity of the diving bird, if refractive index of water is 4//3?

A ship is sailing due north at a speed of 1.25 ms^-1 . The current is taking it towards east at the rate of 2 ms^-1 . and a sailor is climbing a vertical pole in the ship at the rate of 0.25 ms^-1 . Find the magnitude of the velocity of the sailor with respect to ground.

A car is moving towards east with a speed of 25 km h^-1 . To the driver of the car, a bus appears to move towards north with a speed of 25 sqrt(3) km h^-1 . What is the actual velocity of the bus ?

A bird B in air is diving vertically downwards over a water tank with speed 5 cm/s. Base of the tank is silvered. A fish F in the tank is rising vertically upwards along the same line with speed 2 cm/s. Water level is lowered at the rate of 2 cm/s. Take mu_("water")=4//3

The driver of a car moving towards a rocket launching with a speed of 6 ms^(-1) observed that the rocket is moving with speed of 10 ms^(-1) The upward speed of the rocket as seen by the stationary observer is nearly

A particle moves in the direction of east for 2s with velocity of 15 ms^(-1). Then it moves towards north for 8s with a a velocity of 5 ms^(-1). The average velocity of the particle is

VMC MODULES ENGLISH-RAY OPTICS AND WAVE OPTICS -EFFICIENT
  1. A concave mirror has a focal length 20 cm. The distance between the tw...

    Text Solution

    |

  2. A concave mirror of focal length 10cm and a convex mirror of focal len...

    Text Solution

    |

  3. A fish rising up vertically toward the surface of water with speed 3m...

    Text Solution

    |

  4. A point object is placed at distance of 30 cm in front of a convex mi...

    Text Solution

    |

  5. Two beams of light are incident normally on water (R.l. = 4/3). If the...

    Text Solution

    |

  6. A beaker containing liquid is placed on a table, underneath a microsco...

    Text Solution

    |

  7. A ray of light is incident at an angle i from denser to rare medium. T...

    Text Solution

    |

  8. A ray of light travelling in a transparent medium falls on a surface s...

    Text Solution

    |

  9. The size of the image of an object, which is at infinity, as formed by...

    Text Solution

    |

  10. The focal length of a convex lens of R.I. 1.5 is f when it is placed i...

    Text Solution

    |

  11. A point object O is placed on the principal axis of a convex lens of f...

    Text Solution

    |

  12. A plano-convex lens when silvered in the plane side behaves like a con...

    Text Solution

    |

  13. A glass sphere of radius 5 cm has a small bubble at a distance 2 cm fr...

    Text Solution

    |

  14. The focal length of a convex mirror is 20 cm its radius of curvature w...

    Text Solution

    |

  15. An object is placed at a point distant x from the focus of a convex le...

    Text Solution

    |

  16. The distance between object and the screen is D. Real images of an obj...

    Text Solution

    |

  17. A plano- convex lens fits exactly into a plano- concave lens. Their pl...

    Text Solution

    |

  18. A prism of refractive index m and angle A is placed in the minimum dev...

    Text Solution

    |

  19. A ray PQ incident on the refracting face BA is refracted in the prism ...

    Text Solution

    |

  20. An isosceles prism of angle 120^(@) has a refractive index 1.44. Two p...

    Text Solution

    |