Questions
In pure rolling motion of a ring
a) it rotates about instantaneous point of contact of ring and ground
b) its centre of mass moves in translatory motion only
c) its centre of mass will have translatory as well as rotatory motion
detailed solution
Correct option is C
In the diagram shown, O is the point of contact of the ring with the surface. So point O is on surface as well as on the ring. In case of pure rolling, the ring does not slip on the surface. Since the surface is stationary, velocity of point O is called instantaneous centre of rotation and at the instant shown in figure, the entire ring rotates with angular velocity ω = V/R about point O.The distance of COM c from the surface always remains R. So COM moves in translatory motion only. Hence, (a) and (b) are correct.Talk to our academic expert!
Similar Questions
A solid cylinder of mass 2 kg and radius 50 cm rolls up an inclined plane of angle inclination 300. The centre of mass of cylinder has speed of 4 ms-1. The distance travelled by the cylinder on the inclined surface will be
(Take, g = 10 ms-2
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