Advertisements
Advertisements
प्रश्न
A rigid body rotates with an angular momentum L. If its kinetic energy is halved, the angular momentum becomes, ______
पर्याय
L
L/2
2L
L/`sqrt2`
उत्तर
A rigid body rotates with an angular momentum L. If its kinetic energy is halved, the angular momentum becomes, `underline(L/sqrt2)`.
APPEARS IN
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:
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.
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.
Derive an expression for maximum safety speed with which a vehicle should move along a curved horizontal road. State the significance of it.
Derive an expression for the kinetic energy of a rotating body with uniform angular velocity.
A particle undergoes uniform circular motion. The angular momentum of the particle remains conserved about, ______
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 ______.