Home
Class 11
PHYSICS
Two identical discs of same radius R are...

Two identical discs of same radius `R` are rotating about their axes in opposite directions with the same constant angular speed `omega` . The discs are in the same horizontal plane. At time `t = 0` , the points `P` and `Q` are facing each other as shown in the figure. The relative speed between the two points `P` and `Q` is `v_(r)`. In one time period `(T) ` of rotation of the discs , `v_(r)` as a function of time is best represented by

A


B


C


D


Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • Motion in a Plane

    SL ARORA|Exercise Example|111 Videos

  • MECHANICS

    SL ARORA|Exercise Exercise|341 Videos

  • MOTION IN ONE DIMENSION

    SL ARORA|Exercise problems for self practice|66 Videos

Similar Questions

Explore conceptually related problems

A disc of radius R start at time t=0 moving along the positive X-axis with linear speed b and angular speed omega . Find the x and y-coordinates of the bottommost point at any time t.

Two particles P and Q are moving as shown in the figure. At this moment of time the angular speed of P w.r.t. Q is

Two cars are moving is one a same line dimension in opposite direction with the same speed v. The relative velocity of two cars w.r.t. each other is

Two point P and Q. diametrically opposite on a disc of radius R have linear velocities v and 2v as shown in figure. Find the angular speed of the disc.

A disc is freely rotating with an angular speed omega on a smooth horizontal plane. If it is hooked at a rigid pace P and rotates without bouncing about a point on its circumference. Its angular speed after the impact will be equal to.

A disc of radius R is moving on a rough horizontal surface with velocity v and angular speed omega at an instant as shown in figure. Choose the correct statement.

Consider a disc rotating in the horizontal plane with a constant angular speed omega about its centre O . The disc has a shaded region on one side of the diameter and an unshaded region on the other side as shown in the figure. When the disc is in the orientation as shown, two pebbles P and Q are simultaneously projected at an angle towards R. The velocity of projection is in the y-z plane and is same for both pebbles with respect to the disc. Assume that (i) they land back on the disc before the disc has completed (1)/(8) rotation, (ii) their range is less than half the disc radius, and (iii) w remains constant throughout. Then

An electron is at P t = 0 It is circulating in anticlockwise direction with a constant angular speed omega along the shown circular path. Magnetic field at Q(CQ = 2R , where R is radius of the circular) will be recorded as zero at times)

A circular disc of radius R is rotating about its axis O with a uniform angular velocity omega"rad s"^(-1) as shown in the figure. The magnitude of the relative velocity of point A relative to point B on the disc is

SL ARORA-Motion in a Plane-Excercise
  1. A small block is connected to one end of a massless spring of un-stret...

    Text Solution

    |

  2. Consider a disc rotating in the horizontal plane with a constant angul...

    Text Solution

    |

  3. Two identical discs of same radius R are rotating about their axes in ...

    Text Solution

    |

  4. The coordinate of a particle moving in a plane are given by x(t) = ...

    Text Solution

    |

  5. A small block of mass 1 kg is a circular are of ratius 40 m . The blo...

    Text Solution

    |

  6. A small block of mass 1 kg is a circular are of ratius 40 m . The blo...

    Text Solution

    |

  7. Airplanes A and B are flying with constant velocity in the same vertic...

    Text Solution

    |

  8. Two vectors vecA and vecB are defined as vecA=ahati and vecB=a( cos om...

    Text Solution

    |

  9. A ball is projected form the ground at an angle of 45^(@) with the hor...

    Text Solution

    |

  10. Two forces are such that the sum of their magnitudes is 18N and their ...

    Text Solution

    |

  11. A particle is moving eastwards with a velocity of 5 ms(-1). In 10 sec...

    Text Solution

    |

  12. The coordinates of a moving particle at any time t are given by x=alph...

    Text Solution

    |

  13. A vector vecA ur is rotated by a small angle triangletheta radian (tri...

    Text Solution

    |

  14. A particle has an initial velocity 3hati+4hatj and an accleration of 0...

    Text Solution

    |

  15. Consider a rubber ball freely falling from a height h = 4.9 m on a hor...

    Text Solution

    |

  16. A particle is moving with velocity vecv = k( y hat(i) + x hat(j)) , w...

    Text Solution

    |

  17. A boy playing on the roof of a 10 m high building throws a ball with a...

    Text Solution

    |

  18. A projectile can have the same range R for two angles of projection .I...

    Text Solution

    |

  19. A ball is thrown from a point with a speed v0 at an angle of projectio...

    Text Solution

    |

  20. A boy can throw a stone up to a maximum height of 10 m. The maximum ho...

    Text Solution

    |