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15 Questions around this concept.
A solid sphere and cylinder of identical radii and mass approach an incline with the same linear velocity (see figure ). Both roll without slipping all throughout. The two climb maximum heights
As given in the diagram two plates A and B move with velocities -V and 3V . If the sphere does not slide relative to the plate . Assuming mass of each body as m Find the kinetic energy of sphere
A hollow sphere rolling on a surface. what is the % of its translational kinetic energy -
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A solid sphere is rolling on a surface its speed is and mass
.The its Kinetic energy is__
A heavy spool with an inner radius of 10 cm ' and an outer radius ' of 20 cm ' is lying on a rough horizontal plane. A thread of negligible mass is wound over it and is being pulled with a constant force at an angle '
As shown in figure a particle of mass m moves in the x - y plane with a velocity v along the direction AB.
A spinning solid spherical ball having angular velocity
Two balls of mass
The rod is rotating with an angular velocity of
A rod with linear mass density given, as -
Two hollow cylinders of radii '
A fly starts with a constant speed '
Pure Translational motion-
If each particle of it has same velocity/acceleration at a particular instant of time then A body is said to have pure translational motion.
Slipping-
It is motion in which the body slides on a surface without rotation.
Example- Motion of a wheel on a frictionless surface.
Here friction between the body and surface =f= 0
Wheel possesses only translatory kinetic energy
i.e., -
Pure rotational motion-
When a body rotates such that its axis of rotation does not move then that body is said to have pure rotational motion.
In pure rotational motion, each particle of the body has the same angular velocity/acceleration about its axis of rotation at a particular instant of time.
Example- Spinning of the wheel about a fixed axis
Here axis of rotation of a wheel is fixed.
Here, body possesses only rotary kinetic energy.
Here Rotational angular momentum
Where
Another example - the motion of blades of a fan
Combined rotation and translation motion
In this type of motion body has both rotation and translation motion.
Rolling
In the case of rolling motion, a body rotates about a fixed axis, and the axis of rotation also moves.
Example- Rolling of football on the ground
Here friction between the body and surface =
Kinetic energy-
Total kinetic energy of body is sum of both translational and rotational kinetic energy.
Using
Where,
Angular momentum is always calculated about a particular point.
Net Angular momentum of body is sum of angular momentum due to both translational and rotational motion.
Where
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