Question

A disc is rolling, the velocity of its centre of mass is $V_{cm}$. Which one of these will be correct ?

• A. The velocity of highest point is $2\,V_{cm}$ and point of contact is $2\,V_{cm}$
• B. Velocity of highest point is $2\,V_{cm}$ and point of contact is zero
• C. Velocity of highest point is $V_{cm}$ and point of contact is $V_{cm}$
• D. Velocity of highest point is $V_{cm}$ and point of contact is $3 V_{cm}$

Answer 1

Answer: (B)

Correct answer is (b) Velocity of highest point is $2\,V_{cm}$ and point of contact is zero