A round body is given a translational velocit | vedclass

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

Question

(A) When a round body is given only translational velocity $v$ on a rough surface,the velocity of the point of contact is $v$ in the forward direction

Vedclass · Accepted Answer

Body will move forward before pure rolling

Vedclass · Answer

(A) When a round body is given only translational velocity $v$ on a rough surface,the velocity of the point of contact is $v$ in the forward direction. Since there is friction,it acts in the backward direction to oppose this relative motion. This friction force creates a torque about the center of mass,which causes the body to start rotating with angular velocity $\omega$. As $\omega$ increases,the velocity of the point of contact $v_{contact} = v - \omega R$ decreases. The body continues to move forward while its rotational speed increases until the condition for pure rolling,$v = \omega R$,is satisfied. Therefore,the body moves forward during the entire process until pure rolling is achieved.

$A$ round body is given a translational velocity and released on a surface that has friction. Then:

Similar Questions

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

$A$ sphere cannot roll on a ..........

Two identical circular loops are moving with the same kinetic energy; one rolls and the other slides. The ratio of their speed is:

$A$ heavy solid sphere is thrown on a horizontal rough surface with initial velocity $u$ without rolling. What will be its speed when it starts pure rolling motion?

$A$ force $F$ is applied at the centre of a disc of mass $M$. The minimum value of the coefficient of friction of the surface for pure rolling is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module