Home
Class 12
PHYSICS
A glass wind screen whose inclination wi...

A glass wind screen whose inclination with the vertical can be changed is mounted on a car. The moves horizontally with a speed of `2m//s`. At what angle `alpha` with the vertical should the wind screen placed so that the rain drops falling vertically downwards with velcoity `6m//s` strike the wind screen perpendicularly?

Text Solution

Verified by Experts

The correct Answer is:
`tan^(-1) (1//3)`
Promotional Banner

Topper's Solved these Questions

  • KINEMATICS-2D

    ALLEN |Exercise Exercise (S-2)|14 Videos

  • KINEMATICS-2D

    ALLEN |Exercise Exercise (O-1)|40 Videos

  • KINEMATICS-2D

    ALLEN |Exercise Exercise (O-2)|47 Videos

  • GRAVITATION

    ALLEN |Exercise EXERCISE 4|9 Videos

  • MOTION IN A PALNE

    ALLEN |Exercise SOLVED EXAMPLE|28 Videos

Similar Questions

Explore conceptually related problems

Wind is blowing in the north direction at speed of 2 m/s which causes the rain to fall at some angle with the vertical. With what velocity should acyclist drive so that the rain appears vertical to him:

An open water tight railway wagon of mass 5 xx 10(3) kg coats at an initial velocity 1.2 m//s without friction on a railway track. Rain drops fall vertically downwards into the wagon. The velocity of the wagon after it has collected 10^(3) kg of water will be :-

A gun which fires small balls of mass 20 g is firing 20 balls per second on the smooth horizontal table surface ABCD . If the collision is perfectly elastic and balls are striking at the centre of table with a speed of 5 m//s at an angle of 60^(@) with the vertical just before collision, then force exerted by one of the legs on ground is (assume total weight of the table is 0.2 kg )

Rain is falling vertically with a speed of 20ms^(-1) ., A person is running in the rain with a velocity of 5 ms^(-1) and a wind is also blowing with a speed of 15 ms^(-1) (both from the west) The angle with the vertical at which the person should hold his umbrella so that he may not get drenched is:

Raindrops are falling vertically with a velocity 10 m//s . To a cyclist moving on a straight road the rain drops appear to be coming with a velocity of 20m//s . The velocity of cyclist is :-

Rain is fallinf vertically with a speed of 35 m s^(-1) . A women rides a bicycle with a speed of 12 ms ^(-1) in east to west dicrection . What is the direction in which she should hold her umbrella ?

A man walking briskly in rain with speed v must slant his umbrella forward making an angle theta with the vertical. A student derives the following relation between theta and v: tan theta = v and checks that the relation has a correct limit : as vtoo, thetato0 , as expected , (we are assuming there is no strong wind and that the rain falls vertically for a stationary man.) Do you think this relation can be correct ? If you, guess the correct relation.

If the container filled with liquid gets accelerated horizontally or vertically, pressure in liquid gets changed. In liquid ( a_(y) ) for calculation of pressure, effective g is used. A closed box horizontal base 6 m by 6 m and a height 2m is half filled with liquid. It is given a constant horizontal acceleration g//2 and vertical downward acceleration g//2 . What is the value of vertical acceleration of box for given horizontal acceleration (g//2) , so that no part of the bottom of the box is exposed?

A stream of water flowing horizontally with a speed of 15 m s'1 gushes out of a tube of cross-sectional area 10-2 m_(2) and hits a vertical wall nearby. What is the force exerted on the wall by the impact of water assum ing it does not rebound ?

Two blocks of mass m_(1)=10kg and m_(2)=5kg connected to each other by a massless inextensible string of length 0.3m are placed along a diameter of the turntable. The coefficient of friction between the table and m_(1) is 0.5 while there is no friction between m_(2) and the table. the table is rotating with an angular velocity of 10rad//s . about a vertical axis passing through its center O . the masses are placed along the diameter of the table on either side of the center O such that the mass m_(1) is at a distance of 0.124m from O . the masses are observed to be at a rest with respect to an observed on the tuntable (g=9.8m//s^(2)) . (a) Calculate the friction on m_(1) (b) What should be the minimum angular speed of the turntable so that the masses will slip from this position? (c ) How should the masses be placed with the string remaining taut so that there is no friction on m_(1) .

ALLEN -KINEMATICS-2D-Exercise (S-1)
  1. A particle is projected in the x-y plane with y-axis along vertical. T...

    Text Solution

    |

  2. A ball is thrown horizontally from a cliff such that it strikes the gr...

    Text Solution

    |

  3. A Bomber flying upward at an angle of 53^(@) with the vertical release...

    Text Solution

    |

  4. A ball is projected at an angle of 30^(@) above with the horizontal fr...

    Text Solution

    |

  5. A ball is dropped from rest from a tower of height 5m. As a result of ...

    Text Solution

    |

  6. A tank is initially at a perpendicular distance BT=360 m from the plan...

    Text Solution

    |

  7. A Rajput soldier sits on a horse next to a river. Across the river the...

    Text Solution

    |

  8. A ball is projected on smooth inclined plane in direction perpendicula...

    Text Solution

    |

  9. A ball is thrown horizontally from a point O with speed 20 m/s as show...

    Text Solution

    |

  10. A person decided to walk on an escalator which is moving at constant r...

    Text Solution

    |

  11. On a frictionless horizontal surface , assumed to be the x-y plane ,...

    Text Solution

    |

  12. A cuboidal elevator cabon is shown in the figure. A ball is thrown fro...

    Text Solution

    |

  13. Two particles are thrown simultaneously from points A and B with veloc...

    Text Solution

    |

  14. A man crosses a river in a boat. If he cross the river in minimum time...

    Text Solution

    |

  15. Rain is falling vertically with a speed of 20ms^(-1)., A person is run...

    Text Solution

    |

  16. A glass wind screen whose inclination with the vertical can be changed...

    Text Solution

    |

  17. Boat moves with velocity 5 m/s on still water. It is steered perpendic...

    Text Solution

    |

  18. Velocity of the boat with respect to river is 10 m/s. From point A it ...

    Text Solution

    |

  19. Velocity of the boat with respect to river is 10m/s. From point A it i...

    Text Solution

    |

  20. Drift is distance along a river a boat covers in crossing the river. I...

    Text Solution

    |