A disc having velocity $v_0$ and angular speed ${\omega _0}$ in anticlockwise direction kept on the rough plank. Initially plank is at rest. (assuming length of plank is very large) Choose $INCORRECT$ option
A disc having velocity $v_0$ and angular speed ${\omega _0}$ in anticlockwise direction kept on the rough plank. Initially plank is at rest. (assuming length of plank is very large) Choose $INCORRECT$ option
- A
Friction force on the disc is in backward direction till pure rolling start.
- B
Friction force between disc and plank is kinetic in nature till pure rolling start.
- C
Total momentum of system (disc and plank) is conserved.
- D
Angular momentum of disc about any point on the horizontal surface remains conserved.
Similar Questions
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A disc rotating about its axis with angular speed $\omega_{o}$ is placed lightly (without any translational push) on a perfectly frictionless table. The radius of the disc is $R$. What are the linear velocities of the points $A, B$ and $C$ on the disc shown in Figure? Will the disc roll in the direction indicated ?
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- [JEE MAIN 2015]
In the given figure a ring of mass $m$ is kept on a horizontal surface while a body of equal mass $'m'$ attached through a string, which is wounded on the ring. When the system is released the ring rolls without slipping. Consider the following statements and choose the correct option.
$(i)$ acceleration of the centre of mass of ring is $\frac{g}{3}$
$(ii)$ acceleration of the hanging particle is $\frac{2g}{3}$
$(iii)$ frictional force (on the ring) acts along forward direction
$(iv)$ frictional force (on the ring) acts along backward direction
In the given figure a ring of mass $m$ is kept on a horizontal surface while a body of equal mass $'m'$ attached through a string, which is wounded on the ring. When the system is released the ring rolls without slipping. Consider the following statements and choose the correct option.
$(i)$ acceleration of the centre of mass of ring is $\frac{g}{3}$
$(ii)$ acceleration of the hanging particle is $\frac{2g}{3}$
$(iii)$ frictional force (on the ring) acts along forward direction
$(iv)$ frictional force (on the ring) acts along backward direction
A boy is pushing a ring of mass $2 \ kg$ and radius $0.5 \ m$ with a stick as shown in the figure. The stick applies a force of $2 \ N$ on the ring and rolls it without slipping with an acceleration of $0.3 \ m / s ^2$. The coefficient of friction between the ground and the ring is large enough that rolling always occurs and the coefficient of friction between the stick and the ring is $(P / 10)$. The value of $P$ is
A boy is pushing a ring of mass $2 \ kg$ and radius $0.5 \ m$ with a stick as shown in the figure. The stick applies a force of $2 \ N$ on the ring and rolls it without slipping with an acceleration of $0.3 \ m / s ^2$. The coefficient of friction between the ground and the ring is large enough that rolling always occurs and the coefficient of friction between the stick and the ring is $(P / 10)$. The value of $P$ is
- [IIT 2011]