हिंदी

On what factors does the frequency of a conical pendulum depend? Is it independent of some factors? - Physics

Advertisements
Advertisements

प्रश्न

On what factors does the frequency of a conical pendulum depend? Is it independent of some factors?

संख्यात्मक

उत्तर

Expression for a frequency of canonical pendulum is given as:

f = `1/(2pi) sqrt("g"/("L cos" theta)`

Here, f is the frequency, l is the length of pendulum and g is the acceleration due to gravity, and θ is the angle of inclination.

From the above expression, we can see that

  1. The frequency is directly proportional to the root of the acceleration due to gravity `f  oo  sqrtg`.
  2. The frequency is inversely proportional to the length of the length of the pendulum `f oo sqrt("I"/l)`.
  3. The frequency is inversely related to the angle of inclination `f  oo  sqrt(1/ (cos theta))`
  4. The frequency does not depend on the mass of the bob.
shaalaa.com
Rotational Dynamics
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 1: Rotational Dynamics - Exercises [पृष्ठ २४]

APPEARS IN

बालभारती Physics [English] 12 Standard HSC Maharashtra State Board
अध्याय 1 Rotational Dynamics
Exercises | Q 2.3 | पृष्ठ २४

संबंधित प्रश्न

A thin walled hollow cylinder is rolling down an incline, without slipping. At any instant, without slipping. At any instant, the ratio "Rotational K.E.: Translational K.E.: Total K.E." is ______.


Answer in brief:

Why are curved roads banked?


Do we need a banked road for a two-wheeler? Explain.


Somehow, an ant is stuck to the rim of a bicycle wheel of diameter 1 m. While the bicycle is on a central stand, the wheel is set into rotation and it attains the frequency of 2 rev/s in 10 seconds, with uniform angular acceleration. Calculate:

  1. The number of revolutions completed by the ant in these 10 seconds.
  2. Time is taken by it for first complete revolution and the last complete revolution.

The coefficient of static friction between a coin and a gramophone disc is 0.5. Radius of the disc is 8 cm. Initially the center of the coin is 2 cm away from the center of the disc. At what minimum frequency will it start slipping from there? By what factor will the answer change if the coin is almost at the rim? (use g = π2m/s2)


Answer in Brief:

A flywheel used to prepare earthenware pots is set into rotation at 100 rpm. It is in the form of a disc of mass 10 kg and a radius 0.4 m. A lump of clay (to be taken equivalent to a particle) of mass 1.6 kg falls on it and adheres to it at a certain distance x from the center. Calculate x if the wheel now rotates at 80 rpm.


A big dumb-bell is prepared by using a uniform rod of mass 60 g and length 20 cm. Two identical solid spheres of mass 25 g and radius 10 cm each are at the two ends of the rod. Calculate the moment of inertia of the dumb-bell when rotated about an axis passing through its centre and perpendicular to the length.


Does the angle of banking depend on the mass of the vehicle?


During ice ballet, while in the outer rounds, why do the dancers outstretch their arms and legs.


A hollow sphere has a radius of 6.4 m. what is the minimum velocity required by a motorcyclist at the bottom to complete the circle. 


A bend in a level road has a radius of 100m. find the maximum speed which a car turning this bend may have without skidding if the coefficient of friction between the tires and road is 0.8. 


A bucket containing water is tied to one end of a rope 5 m long and it is rotated in a vertical circle about the other end. Find the number of rotations per minute in order that the water in the bucket may not spill.


Derive an expression for the kinetic energy of a rotating body with uniform angular velocity. 


A railway track goes around a curve having a radius of curvature of 1 km. The distance between the rails is 1 m. Find the elevation of the outer rail above the inner rail so that there is no side pressure against the rails when a train goes around the curve at 36 km/hr. 


What is a conical pendulum? Obtain an expression for its time period


A particle undergoes uniform circular motion. The angular momentum of the particle remains conserved about, ______


When a mass is rotating in a plane about a fixed point, its angular momentum is directed along, ______


Give any two examples of torque in day-to-day life.


What are the rotational equivalents for the physical quantities, (i) mass and (ii) force?


Discuss conservation of angular momentum with example.


A flywheel rotates with uniform angular acceleration. If its angular velocity increases from `20pi` rad/s to `40pi` rad/s in 10 seconds. Find the number of rotations in that period.


A uniform metallic rod rotates about its perpendicular bisector with constant angular speed. If it is heated uniformly to raise its temperature to a certain value, its speed of rotation ______.


A wheel of radius 2 cm is at rest on the horizontal surface. A point P on the circumference of the wheel is in contact with the horizontal surface. When the wheel rolls without slipping on the surface, the displacement of point P after half rotation of wheel is ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×