Home
Class 11
PHYSICS
Statement-1: As wind flows left to right...

Statement-1: As wind flows left to right and a ball is spined as shown, there will be a lift of the ball.
Statement-2: Decrease in velocity of air below the ball, increases the pressure more than that above the ball.

A

Statement-1, is true, Statement-2 is true, Statement-2 is correct explanation for statement-1

B

Statement-1 is true, statement-2 is true, statement-2 is NOT a correct explantion for statement-1

C

statement-1 is true, statement-2 is false

D

statement-1 is false statement-2 is true

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • ELASTICITY, SURFACE TENSION AND FLUID MECHANICS

    ALLEN|Exercise Exercise 3 (Comprehension based questions)|24 Videos

  • ELASTICITY, SURFACE TENSION AND FLUID MECHANICS

    ALLEN|Exercise Exercise 4 A (Elasticity)|7 Videos

  • ELASTICITY, SURFACE TENSION AND FLUID MECHANICS

    ALLEN|Exercise Exercise 2 (One or more than one correct answer)|53 Videos

  • CENTRE OF MASS

    ALLEN|Exercise EXERCISE-V B|19 Videos

  • ERROR AND MEASUREMENT

    ALLEN|Exercise Part-2(Exercise-2)(B)|22 Videos

Similar Questions

Explore conceptually related problems

A lead ball strikes a wall and falls down, a tennis ball having the same mass and velocity strikes the wall and bounces back. Check the correct statement

A ball falling in a lake of depth 200m shown 0.1% decrease in its volume at the bottom .What is the bulk modulus of the materialof the ball

Assertion:- A ball allowed to spin in a region of uniform wind motion, will get an uplift. Reason:- Due to spin of the ball in a region of uniform wind motion, the difference in velocity of air flow is present between the lower and upper position of ball, leading to varying pressure.

Two balls of same size but different masses m_(1) and m_(2)(m_(2)gtm_(1)) are attached to the two ends of a thin light thread and dropped from a certain height. It is known that the ciscous drag of air depends on the size and velocities of the balls. other than the gravitational pull from the earth and the viscous drag, the buoyant force from air also act on the balls, the buoyant force on a ball equals to the wweight of air displaced by the ball. After sufficiently long time from the instant the balls were dropped both of them acquire uniform velocity known as terminal velocity. When the balls have acquired terminal velocity, the tension in the thread is

Statement-1: A light celluloid ball placed in a stream of gas or water issuing at a high velocity from a tube with a narrow neck, the ball floats freely however in this stream (fig) Statement-2: The gas is the stream has a high velocity, the pressure inside the stream is above atmospheric.

Two uniform solid balls of same density and if radii r and 2r are dropped in air and fall vertically downwards. The terminal velocity of the ball with radius r is 1cms^-1 , then the terminal velocity of the ball of radius 2r will be (neglect buoyant force on the balls.)

Statement I : Escape velocity of a tennis ball from the surface of earth is the same as the escape velocity of a cricket ball from the surface of earth. Statement II : Escape velocity of a body is independent of the mass of the body

A ball is thrown vertically down with velocity of 5m/s. With what velocity should another ball be thrown down after 2 seconds so that it can hit the 1 st ball in 2 seconds

A ball is thrown at angle theta and another ball is thrown at an angle (90^(@)-theta) with the horizontal direction from the same point with velocity 39.2 ms^(-1) . The second ball reaches 50 m higher than the first ball. Find their individual heights. Take g = 9.8 ms^(-2) .

ALLEN-ELASTICITY, SURFACE TENSION AND FLUID MECHANICS-Exercise 3 (Assertion & Reason)
  1. Statement-1: In gravity free space, the liqid in a capillary tube will...

    Text Solution

    |

  2. Statement-1: It is better to wash the clothes in cold soap solution. ...

    Text Solution

    |

  3. Statement-1: A gas filled balloon stops rising after it has attained a...

    Text Solution

    |

  4. Statement-1: A parachute descends slowly whereas a stone dropped from ...

    Text Solution

    |

  5. Statement-1: hot soup tastes better than the cold soup. Statement-2:...

    Text Solution

    |

  6. Statement-1: Roofs of buildings are blown off during a strong storm. ...

    Text Solution

    |

  7. Statement-1: The stream of water emerging from a wate tap "necks down"...

    Text Solution

    |

  8. Statement-1: As wind flows left to right and a ball is spined as shown...

    Text Solution

    |

  9. Statement-1: A block is immersed in a liquid inside a beaker which is ...

    Text Solution

    |

  10. Statement-1: An ice cube is floating in water in a vessel at 0^(@)C wh...

    Text Solution

    |

  11. Statement-1: Leaves and small insects float on the surface of water bu...

    Text Solution

    |

  12. Statement-1: Weight of a empty balloon measured in air is w(1). If air...

    Text Solution

    |

  13. Statement-1: The stretching of a coil is determined by its shear modul...

    Text Solution

    |

  14. Assertion : At critical temperature, surface tension of liquids become...

    Text Solution

    |

  15. Statement -1 : A large soap bubble expands while a small bubble shrink...

    Text Solution

    |

  16. Statement-1: The size of a hydrogen increases as it rises in air. St...

    Text Solution

    |

  17. Statement I: Smaller drops of liquid resist deforming forces better th...

    Text Solution

    |

  18. Assertion : Specific gravity of a fluid is a dimensionless quantity. ...

    Text Solution

    |

  19. Statement-1: For reynold number R(e)gt2000 the flow of fluid is turbul...

    Text Solution

    |

  20. Statement-1: A thin stainless steel needle can lay floating on a still...

    Text Solution

    |