Question

A cylinder rolls without slipping on a horizontal plane surface. If the speed of the centre is $25m/s$ what is the speed of the highest point?

Answer 1

The top point will have velocity

$V=v+r\omega$,

Since, $v=25m/s$ and $r\omega$ is the linear velocity of top most point which will be also in $forward$ direction so $added$ to $v$

And as the motion is without slipping so

$v=r\omega$ or $r\omega =v$

so net velocity ,

$V=v+r\omega$

$=v+v=2v=2\times 25m/s=50m/s$