Question

A 2.0kg solid disk rolls without slipping on a horizontal surface so that its center proceeds to the right with a speed of 5.0 m/s. What is the instantaneous speed of the point of the disk that makes contact with the surface?

Answer 1

Answer:

Instantaneous speed of contact point will be ZERO

Explanation:

As we know that disc is rolling without slipping on horizontal surface

So here the speed of center of the disc is given as

v = 5 m/s

now at the contact point the tangential speed will be in reverse direction

$v_t = R\omega$

now we know that net contact speed with respect to its lower surface must be zero

$v_{net} = v - v_t = 0$

so net velocity of contact point with respect to its lower surface must be ZERO here