Home
Class 11
PHYSICS
Assertion:- A ball allowed to spin in a ...

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.

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)|23 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

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.

Assertion:- A bowler throuws a ball such that it moves in air with constant angular velocity (Ignorning the air resistance) Reason:- Spin angular momentum of ball is independent of reference frame

A small ball of mass m and charge q is attached to the bottom end of a piece of negligible mass thread of length l, whose top end is fixed. The system formed by the thread and ball is in vertical plane and is in uniform horizontal magnetic field B, which is perpendicular to the plane of figure and points into the paper The ball is started with a velocity v_(0) from lower most point of circle in a direction perpendicular both to the magnetic induction and to direction of thread. The ball moves along a circular path such that thread remains tight during the whole motion. Neglect any loss of enery. What is the magnitude of magnetic induction B, if the minimum initial speed at which the described motion of ball (complete vertical circular motion) occurs is V_(0)=(1)/(2)sqrt(17gL)

A small ball of mass m and charge q is attached to the bottom end of a piece of negligible mass thread of length l, whose top end is fixed. The system formed by the thread and ball is in vertical plane and is in uniform horizontal magnetic field B, which is perpendicular to the plane of figure and points into the paper The ball is started with a velocity v_(0) from lower most point of circle in a direction perpendicular both to the magnetic induction and to direction of thread. The ball moves along a circular path such that thread remains tight during the whole motion. Neglect any loss of enery. Choose CORRECT statement

A small ball of mass m and charge q is attached to the bottom end of a piece of negligible mass thread of length l, whose top end is fixed. The system formed by the thread and ball is in vertical plane and is in uniform horizontal magnetic field B, which is perpendicular to the plane of figure and points into the paper The ball is started with a velocity v_(0) from lower most point of circle in a direction perpendicular both to the magnetic induction and to direction of thread. The ball moves along a circular path such that thread remains tight during the whole motion. Neglect any loss of enery. By what factor is the force acting on the thread (tension in thread) at point A is greater than at point C, when speed of the ball is the above stated one?

A car P is moving with a uniform speed 5sqrt3 m//s towards a carriage of mass 9 kg at rest kept on the rails at a point B as shown in figure. The height AC is 120 m. Cannon balls of 1 kg are fired from the car with an initial velocity 100m//s at an angle 30^@ with the horizontal. The first cannon hall hits the stationary carriage after a time t_0 and sticks to it. Determine t_0 . At t_0 , the second cannon ball is fired. Assume that the resistive force between the rails and the carriage is constant and ignore the vertical motion of the carriage throughout. If the second ball also hits and sticks to the carriage, what will be the horizontal velocity of the carriage just after the second impact?

ALLEN -ELASTICITY, SURFACE TENSION AND FLUID MECHANICS-Exercise 3 (Assertion & Reason)
  1. Statement-1: Upthurst on a solid block of iron when immersed in a lake...

    Text Solution

    |

  2. Statement-1: Two identical conincal pipes shown in figure have a drop ...

    Text Solution

    |

  3. Assertion:- A ball allowed to spin in a region of uniform wind motion,...

    Text Solution

    |

  4. Statement-1: Elasticity restoring forces may be conservative. State...

    Text Solution

    |

  5. Statement-1: The bridges are declared unsafe after a long use. Stat...

    Text Solution

    |

  6. Statement-1: Young's modulus for a perfectly plastic body is zero St...

    Text Solution

    |

  7. Assertion : identical springs of steel and copper are equally stretche...

    Text Solution

    |

  8. Assertion: The velocity of flow of a liquid is smaller when pressure i...

    Text Solution

    |

  9. Statement-1: The shape of an automobile is so designed that its front ...

    Text Solution

    |

  10. Statement-1: Machine parts are jammed in winter. Statement-2: The vi...

    Text Solution

    |

  11. Statement-1: The angle of contact of a liquid decrease with increase i...

    Text Solution

    |

  12. Statement-1: In gravity free space, the liqid in a capillary tube will...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |