Question

For a rotating rod, what is the velocity of a small element at distance \[r\] from the centre?

Options

• \[v=\omega R^2\]

• \[v=r/\omega\]

• \[v=\omega r\]

• \[v=\omega/r\]

Answer 1

Each small element moves with velocity \[v=\omega r\]. Its velocity therefore depends on its distance \[r\] from the centre.