Comment
Share
Q)

# A stone is thrown vertically upwards with a velocity $98 m/s$ Its velocity will be zero after

$\begin{array}{1 1} (a) \;14\;s \\ (b) \;10\;s \\ (c) \;20\;s \\ (d) \;5\;s\end{array}$

$v=u+at$
$a=-g\;v=0$
$0=98-(9.8)t$
$t= \large\frac{98}{9.8}$$=10s$