Q. An object is projected upwards with a velocity of $100m/s$. It will strike the ground after (approximately)
A) 10 sec
B) 20 sec
C) 15 sec
D) 5 sec
Explanation
(b) $Time\ of\ flight = \frac{2u}{g} = \frac{2 \times 100}{10} = 20\ \sec$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.