Q. A boy released a ball from the top of a building. It will clear a window 2m high at a distance 10m below the top in nearly
A) 1 s
B) 1.3 s
C) 0.6 s
D) 0.13 s
Explanation
(d) $\mathrm{\Delta}t = \sqrt{\frac{2 \times 12}{10}} - \sqrt{\frac{2 \times 10}{10}}$
$= 1.549$s$-$1.414s =0.135s
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.