Question

A circular disc rolls on a horizontal floor without slipping and the centre of the disc moves with a uniform velocity v.Which of the following values the velocity at a point on the rim of the disc can have?

• A. V
• B. -V
• C. 2V
• D. Zero

Answer 1

Answer: (A), (C), (D)

The correct options are
A V
C 2V
D Zero

$v=r\omega$

at the top point

$\to v\Rightarrow \overrightarrow{vel}=2v$

$\to r\omega$

at the bottim point

$\to v\Rightarrow \overrightarrow{vel}=0\leftarrow r\omega$

at point of angle 120 degree

$\Rightarrow \overrightarrow{vel}=v$