Q. A ball is thrown vertically upwards from the top of a tower at $4.9\ ms^{- 1}$. It strikes the pond near the base of the tower after 3 $seconds$. The height of the tower is
A) $73.5\ m$
B) $44.1\ m$
C) $29.4\ m$
D) None of these
Explanation
(c) $h = ut + \frac{1}{2}gt^{2},t = 3\ \sec,\ u = - 4.9m/s$
$\Rightarrow h = - 4.9 \times 3 + 4.9 \times 9 = 29.4\ m$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.