Q. A stone dropped from of the tower touches the ground in $4\ sec$. The height of the tower is aboout
A) $80\ m$
B) $40\ m$
C) $20\ m$
D) $160\ m$
Explanation
(a) $h = \frac{1}{2}gt^{2} = \frac{1}{2} \times 10 \times (4)^{2} = 80\ m$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.