A body is thrown vertically upwards from the top A of tower. It reaches the ground in t1 s. If it is thrown vertically downwards from A with the same speed it reaches the ground in t2 s. If it is allowed to fall freely from A, then the time it takes to reach the ground is given by
see full answer
High-Paying Jobs That Even AI Can’t Replace — Through JEE/NEET
🎯 Hear from the experts why preparing for JEE/NEET today sets you up for future-proof, high-income careers tomorrow.
An Intiative by Sri Chaitanya
a
t=t1+t22
b
t=t1-t22
c
t=t1t2
d
t=t1t2
answer is C.
(Unlock A.I Detailed Solution for FREE)
Best Courses for You
JEE
NEET
Foundation JEE
Foundation NEET
CBSE
Detailed Solution
Taking downward direction as the positive direction,+h=-ur1+12gr12---(i) +h=mt2+12gt22 ---(ii)Multiplying Eq. (i) by t2 and Eq. (ii) by t1 and adding, we getht1+t2=12gt1t2t1+t2ofh=12gt1t2For free fall from rest, h=12gt2t2=t1t2 t=t1t2