Home
Class 11
PHYSICS
One end of a string of length L and cros...

One end of a string of length L and cross sectional area A is fixed to a support and the other end is fixed to a bob of mas m. The bob is revolved in a horizontal circle of radius r with an angular velocity `omega` such that the string makes an angle `theta` with the vertical. Young's modulus is Y.
The angular velocity `omega` is equal to

A

`sqrt((gsintheta)/r)`

B

`sqrt((gcostheta)/r)`

C

`sqrt((g tantheta)/r)`

D

`sqrt((g cottheta)/r)`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • ELASTICITY

    CHHAYA PUBLICATION|Exercise ENTRANCE CORNER (Integer answer Type)|5 Videos
  • ELASTICITY

    CHHAYA PUBLICATION|Exercise EXAMINATION ARCHIVE WITH SOLUTIONS (WBCHSE)|6 Videos
  • ELASTICITY

    CHHAYA PUBLICATION|Exercise ENTRANCE CORNER (Multiple correct answer type)|6 Videos
  • DOPPLER EFFECT IN SOUND

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|2 Videos
  • EXPANSION OF GASES

    CHHAYA PUBLICATION|Exercise CBSE Scanner|1 Videos

Similar Questions

Explore conceptually related problems

One end of a string of length L and cross sectional area A is fixed to a support and the other end is fixed to a bob of mas m. The bob is revolved in a horizontal circle of radius r with an angular velocity omega such that the string makes an angle theta with the vertical. Young's modulus is Y. The tension T in the string is

One end of a string of length L and cross sectional area A is fixed to a support and the other end is fixed to a bob of mas m. The bob is revolved in a horizontal circle of radius r with an angular velocity omega such that the string makes an angle theta with the vertical. Young's modulus is Y. The increase DeltaL in length of the string is

Effective length of a pendulum is 50 cm and the mass of the bob is 4g . The bob is drawn to one side until the string is horizontal , and is then released. When the string makes an angle 60^@ with the vertical , what is the velocity and the kinetic energy of the bob ?

A copper wire of negligible mass of length 1 m and cross sectional area 10^-6 m^2 is kept on a smooth horizontal table with one end fixed. A ball of mass 1 kg is attached to the other end. The wire and the ball are revolving with an angular velocity of 20 rad.s^-1 . IF the elongation in the length of the wire is 10^-3m , obtain the Young's modulus. IF on increasing the angular velocity to 100 rad .s^-1 the wire breaks down, obtain the breaking stress.

A body of mass 40 kg is tied at one end of a string of length l. The body is oscillating in a vertical plane with angular amplitude theta_0 . What is the tension in the string when it makes and angle theta with the vertical ? If the breaking load for the string is 80 kgf, what can be the maximum angular amplitude of the body ?

A uniform rod weights W, has length L and cross sectional area a. The rod is suspended from one of its ends. The young's modulus of its material is Y. Increase in length of the rod will be