A ball thrown by a boy is caught by another after $2\ sec$. some distance away in the same level. If the angle of projection is $30^o $, the velocity of projection is ......... $m/s$
A ball thrown by a boy is caught by another after $2\ sec$. some distance away in the same level. If the angle of projection is $30^o $, the velocity of projection is ......... $m/s$
$19.6 $
$9.8 $
$14.7 $
None of these
A ball thrown by a boy is caught by another after $2\ sec$. some distance away in the same level. If the angle of projection is $30^o $, the velocity of projection is ......... $m/s$
$T = \frac{{2u\sin \theta }}{g}$
$⇒$ $u = \frac{{T \times g}}{{2\sin \theta }} = \frac{{2 \times 9.8}}{{2 \times \sin 30}} = 19.6\,m/s$