A ball is thrown vertically upwards from the top of a tower at $4.9\,\,m{s^{ - 1}}$. It strikes the pond near the base of the tower after $3 $ seconds. The height of the tower is........$m$
A ball is thrown vertically upwards from the top of a tower at $4.9\,\,m{s^{ - 1}}$. It strikes the pond near the base of the tower after $3 $ seconds. The height of the tower is........$m$
$73.5$
$44.1$
$29.4$
None of these
A ball is thrown vertically upwards from the top of a tower at $4.9\,\,m{s^{ - 1}}$. It strikes the pond near the base of the tower after $3 $ seconds. The height of the tower is........$m$
$h = ut + \frac{1}{2}g{t^2},\;t = 3\;\sec ,\;u = - 4.9\;m/s$
$ \Rightarrow h = - 4.9 \times 3 + 4.9 \times 9 = 29.4\;m$