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`
Advertisements
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 ______.
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.
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.
Obtain an expression for maximum safety speed with which a vehicle can be safely driven along a curved banked road.
When a mass is rotating in a plane about a fixed point, its angular momentum is directed along, ______
What is the relation between torque and angular momentum?
What are the rotational equivalents for the physical quantities, (i) mass and (ii) force?
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 ______.
