Related InterviewSolutions

• A uniform rod AB of length 2l and mass `m` is rotating in a horizontal plane about a vertical axis through A, with angular velocity `omega`, when the mid-point of the rod strikes a fixed nail and is brought immediately to rest. Find the impulse exerted by the nail.
• A rod of mass 2 kg ad length 2 m is rotating about its one end `O` wth an angular velocity `omega=4rad//s`. Find angular momentum of the rod about the axis rotation.
• a hoop is placed on the rough surface such that it has an angular velocity `omega=4rad//s` and an angular deceleration `alpha=5rad//s^(2)` also its centre has a velocity of `v_(0)=5m//s` and a decoleration `a_(0)=2m//s^(2)` determine the magnitude of acceleration of point B at this instant.
• If two circular disks of the weight and thickness are made from metals having different densities. Which disk, if either will have the larger moment of inertia about its central axis.
• Let `vecA` be a unit vecrtor along the axis of rotation of a purely rotating body and `vecB` be a unit vector along the velocity of a particle P of the body away from the axis. The value of `vecA.vecB` isA. 1B. -1C. 0D. none of these
• A body is uniformly rotating bout an axis fixed in an inertial frame of reference. Let `vecA` be a unit vector along the axis of rotation and `vecB` be the unit vector along the resultant force on a particle P of te ody away from the axis. The value of `vecA.vecB` isA. 1B. -1C. 0D. none of these
• The axis of rotation of a purely rotating bodyA. must pass thruogh the centre of masB. may pas through the centre of massC. must pass through a particle of the bodyD. may pass through a paerticle of the body
• A string of negligible thicknes is wrapped several times around a cylinder kept on a rough horizontal surface. A man standing at a distance l from the cylinder holds one end of the sitting an pulls the cylinder towards him figure. There is no slipping anywhere. The length of the string passed through the hand of the man whicle the cylinder reaches his hands is A. lB. 2lC. 3lD. 4l
• A cylinder having radius 0.4 m initially rotating (at `r=0`) with `omega_(0)=54rad//s` is placed on a rough inclinded plane with `theta=37^(@)` having friction coefficient `mu=0.5` the time taken by the cylinder to start pure rolling is `(g=10m//s^(2))`A. 5.4 sB. 2.4 sC. 1.4 sD. none of these
• A force `F=(2hati+3hatj+4hatk)N` is acting at point `P(2m,-3m,6m)` find torque of this force about a point `O` whose position vector is `(2hati-5hatj+3hatk)` m.