A solid sphere with a velocity (of centre of | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) When a sphere is placed on a rough horizontal surface,the frictional force depends on the condition of rolling. If the sphere is placed such that

Vedclass · Accepted Answer

none of the above

Vedclass · Answer

(D) When a sphere is placed on a rough horizontal surface,the frictional force depends on the condition of rolling. If the sphere is placed such that the velocity of the point of contact $v_p = v - r\omega = 0$,then the relative velocity between the sphere and the surface is zero. In this specific case,there is no relative motion between the point of contact and the surface,so the frictional force acting on the sphere is zero. Since the problem does not specify that $v 
eq r\omega$,it is possible for the frictional force to be zero. Therefore,none of the given statements (which claim the force must be forward,backward,or cannot be zero) are universally true.

$A$ solid sphere with a velocity (of centre of mass) $v$ and angular velocity $\omega$ is gently placed on a rough horizontal surface. The frictional force on the sphere:

Similar Questions

$A$ solid sphere rolls without slipping on a rough surface and the centre of mass has a constant speed $v_0$. If the mass of the sphere is $m$ and its radius is $R$,then find the angular momentum of the sphere about the point of contact $P$.

$A$ solid sphere of mass $2 \ kg$ and radius $0.5 \ m$ is rolling without slipping on a horizontal surface. The ratio of the rotational and translational kinetic energies of the sphere is (in $: 5$)

The ratio of kinetic energies of two spheres rolling with equal centre of mass velocities is $2 : 1$. If their radii are in the ratio $2 : 1$,then the ratio of their masses will be

$A$ solid sphere spinning about a horizontal axis with an angular velocity $\omega$ is placed on a horizontal surface. Subsequently,it rolls without slipping with an angular velocity of

$A$ circular disc is rolling on a horizontal plane. Its total kinetic energy is $300 \, J$. The translational kinetic energy of the disc is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module