Home
Class 12
PHYSICS
Consider a U- shaped fixed smooth wire o...

Consider a U- shaped fixed smooth wire over which a bead of mass (m) is thrown with speed v.

The bead enters semicircular part at A and leaves at B. What is the magnitude of average force exerted by the bead on the part AB of the wire ?

A

`(mv^(2))/(pid)`

B

`(2mv^(2))/(pi d)`

C

`(4 mv^(2))/(pi d)`

D

0

Text Solution

Verified by Experts

The correct Answer is:
C
`vec(F)_(avg) = Delta vec(p) = (2mv)/(Delta t) = (2mv)/(((pi d//2)/(v))) = (4mv^(2))/(pid)`
Promotional Banner

Topper's Solved these Questions

  • TEST PAPERS

    BANSAL|Exercise PHYSICS PART (A)|32 Videos

  • TEST PAPERS

    BANSAL|Exercise PHYSICS PART (B)|3 Videos

  • TEST PAPERS

    BANSAL|Exercise PHYSICS PART- C|4 Videos

  • SEMICONDUCTORS

    BANSAL|Exercise CBSE Question|32 Videos

Similar Questions

Explore conceptually related problems

A fixed U -shaped smooth wire has a semi-circular bending between A and B as shown in the figure. A bead of mass 'm' moving with uniform speed v through the wire enters the semicircular bend at A and leaves at B . The magnitude of average force exerted by the bead on the part AB of the wire is

A U-shaped smooth wire has a semi-circular bending between A and B as shown in fig. A bead of mass m moving with uniform speed v through the wire enters the semiculcular bent at A and leaves at B. Find the average force exerted by the bead on the part AB of the wire.

A U -shaped wire has a semicircular bending between A and B as shown in Fig. A bead of mass m moving with uniform speed v through a wire enters the semicircular bend at A and leaves at B with velocity v//2 after time T . The average force exerted by the bead on the part AB of the wire is

A wire, which passes through the hole in a small bead, is bent in the form of quarter of a circle. The wire is fixed vertically on ground as shown in the figure. The bead is released from near the top of the wire and it slides along the wire without friction. As the bead moves from A to B, the force it applies on the wire is

A piece of wire is bent in the shape of a parabola y = Kx^(2) (y - axis vorical) with a bead of mass m on it . The beat can side on the wire without friction , it stays the wire is now accleated parallel to the bead , where the bead can stay at rest with repect to the wire from the y - axis is

Two long, parallel wires are separated by a distance of 0.400m (as shown in Fig.) The current I_1 and I_2 have the direction shown. (a) Calculate the magnitude of the force exerted by each wire on a 1.20m length of the other. Is the force attractive or repulsive ? (b) Each current is doubled, so that I_1 becomes 10.0A and I_2 becomes 4.00A. Now, what is the magnitude of the force that each wire exerts on a 1.20m length of the other?

A small, electrically charged bead can slide on a circular, frictionless, thin, insulating ring. Charge on the bead is Q and its mass is m . A small electric dipole, having dipole moment P is fixed at the centre of the circle with the dipole’s axis lying in the plane of the circle. Initially, the bead is held on the perpendicular bisector of the dipole (see fig.) Ignore gravity and answer the following questions. (a) Write the speed of the bead when it reaches the position theta shown in the figure. (b) Find the normal force exerted by the ring on the bead at position theta . (c) How does the bead move after it is released? Where will the bead first stop after being released? (d) How would the bead move in the absence of the ring?

BANSAL-TEST PAPERS-PHYSICS
  1. A bob of mass m is connected to a spring of spring constant k and a st...

    Text Solution

    |

  2. A bob of mass 0.25 kg is attached with a string of length 0.25 m. The ...

    Text Solution

    |

  3. Consider a U- shaped fixed smooth wire over which a bead of mass (m) i...

    Text Solution

    |

  4. Two cars P and Q start from a point at the same time in a straight lin...

    Text Solution

    |

  5. The maximum tension in the string of a simple pendulum is 1.2 times th...

    Text Solution

    |

  6. A projectile is thrown from a point on ground with an initial speed u ...

    Text Solution

    |

  7. The engine of a motoecycle can produce a maximum acceleration of 5 m//...

    Text Solution

    |

  8. An object is thrown horizontally from a tower H meter high with a velo...

    Text Solution

    |

  9. Figure-2.107 shows a block of mass m attached to a spring of force con...

    Text Solution

    |

  10. A block of mass m(1) rests on a rough horizontal plane with coefficien...

    Text Solution

    |

  11. A heavy body of mass 25kg is to be dragged along a horizontal plane (...

    Text Solution

    |

  12. A cord is used to lower vertically a block of mass M, a distance d at ...

    Text Solution

    |

  13. A particle moves along a straight line and its velocity depends on tim...

    Text Solution

    |

  14. A stone is projected at an angle alpha to the horizontal from the top ...

    Text Solution

    |

  15. The velocity (in m/s) of centre of mass of the system as shown in the ...

    Text Solution

    |

  16. In which of the following cases, the centre of mass of rod may be its ...

    Text Solution

    |

  17. Five particles, each of mass 3 kg, start moving in the clockwise sense...

    Text Solution

    |

  18. A stationary person observes that rain is falling vertically down at 3...

    Text Solution

    |

  19. Power delivered to a paticle varies with time as P = (3t^(2) - 2t) wat...

    Text Solution

    |

  20. If a particle of mass m start from along curved circular path shown in...

    Text Solution

    |