हिंदी

Answer the following question. Define angular velocity. - Physics

Advertisements
Advertisements

प्रश्न

Answer the following question.

Define angular velocity.

परिभाषा
एक पंक्ति में उत्तर

उत्तर

Angular velocity of a particle is the rate of change of angular displacement.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 3: Motion in a Plane - Exercises [पृष्ठ ४५]

APPEARS IN

बालभारती Physics [English] 11 Standard Maharashtra State Board
अध्याय 3 Motion in a Plane
Exercises | Q 2. (x) | पृष्ठ ४५

संबंधित प्रश्न

A particle rotates in U.C.M. with tangential velocity V along a horizontal circle of diameter ‘D' . Total angular displacement of the particle in time 't' is..........


Draw a neat labelled diagram of conical pendulum. State the expression for its periodic time in terms of length.


Is it possible to have an accelerated motion with a constant speed? Explain


Why is the motion of a body moving with a constant speed around a circular path said to be accelerated?


Give an example of motion in which speed remains uniform, but the velocity changes.


A piece of stone tied at the end of a thread is whirled in a horizontal circle with uniform speed by hand. Answer the following questions:

  1. Is the velocity of stone uniform or variable?
  2. Is the acceleration of stone uniform or variable?
  3. What is the direction of acceleration of stone at any instant?
  4. Which force provides the centripetal force required for circular motion?
  5. Name the force and its direction which acts on the hand.

State True or False

The earth moves around the sun with a uniform.


A uniform linear motion is unaccelerated, while a uniform circular motion is an accelerated motion.


Complete a sentence and explain it.

When an object is in uniform circular motion, its ______ changes at every point.


Is the uniform circular motion accelerated? Give reasons for your answer.


A particle performs uniform circular motion in a horizontal plane. The radius of the circle is 8 cm. The centripetal force acting on the particle is 15 N. Its kinetic energy is ____________.


A wheel is 0.25 m in radius. When it makes 15 revolutions per minute, its linear speed at the point on circumference is ____________.


A ball of mass 'm' is attached to the free end of an inextensible string of length 'l'. Let 'T' be the tension in the string. The ball is moving in horizontal circular path about the vertical axis. The angular velocity of the ball at any particular instant will be ______.


A stone of mass 3 kg attached at one end of a 2m long string is whirled in horizontal circle. The string makes an angle of 45° with the vertical then the centripetal force acting on the string is ______.

(g = 10 m/s2 , tan 45° = 1)


The angular speed of the minute hand of a clock in degrees per second is ______.


A cyclist is riding with a speed of 43.2 km/h. As he approaches a circular turn on the road of radius 60 m, he applies brakes and reduces his speed at constant rate of 1.8 ms-2. The magnitude of the net acceleration of the cyclist is ______.


The given graph represents motion with ______ speed.


A point object moves along an arc of a circle of radius 'R'. Its velocity depends upon the distance covered 'S' as V = `Ksqrt(S)` where 'K' is a constant. If 'e' is the angle between the total acceleration and tangential acceleration, then


A flywheel at rest is to reach an angular velocity of 24 rad/s in 8 second with constant angular acceleration. The total angle turned through during this interval is ______.


A body moving along a circular path of radius R with velocity v, has centripetal acceleration a. If its velocity is made equal to 2v. What will be the centripetal acceleration?


If a body is moving in a circle of radius r with a constant speed v, its angular velocity is ______.


A particle is given an initial speed u inside a smooth spherical shell of radius R = 1 m that it is just able to complete the circle. Acceleration of the particle when its velocity is vertical is ______.


A small bead of mass m can move on a smooth circular wire (radius R) under the action of a force F = `"Km"/"r"^2` directed (r = position of bead r from P and K = constant) towards a point P within the circle at a distance R/2 from the centre. The minimum velocity should be ______ m/s of bead at the point of the wire nearest the centre of force (P) so that bead will complete the circle. (Take `"k"/(3"R")` = 8 unit) 


A wet open umbrella is held upright and is rotated about the handle at a uniform rate of 21 revolutions in 44 s. If the rim of the umbrella is a circle of 1 metre in diameter and the height of the rim above the floor is 1.5 m, the drops of water spun off the rim and hit the floor at a horizontal ______ m from the umbrella.


The distance of the Sun from earth is 1.5 × 1011 m and its angular diameter is (2000) s when observed from the earth. The diameter of the Sun will be ______.


A particle moves along a circle of radius r with constant tangential acceleration. If the velocity of the particle is v at the end of second revolution, after the revolution has started, then the tangential acceleration is ______.


A thin uniform circular disc of mass M and radius R is rotating in a horizontal plane about an axis passing through its centre and perpendicular to its plane with an angular velocity ω. Another disc of same dimensions, but of mass `1/4`M is placed gently on the first disc co-axially. The. angular velocity of the system is ______.


A body of mass m is moving in circle of radius r with a constant speed v. The work done by the centripetal force in moving the body over half the circumference of the circle is ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×