Q.
Air streams horizontally across an aero plane wing area 5m2 weighing 300 kg. The air speed is 30 m/s and 20 m/s over the top surface and the bottom surface respectively what is the lift on the wing? (density of air 2grm/ litre)
see full answer
Start JEE / NEET / Foundation preparation at rupees 99/day !!
21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!
An Intiative by Sri Chaitanya
a
1500 N
b
1000 N
c
2500 N
d
3500 N
answer is C.
(Unlock A.I Detailed Solution for FREE)
Ready to Test Your Skills?
Check your Performance Today with our Free Mock Test used by Toppers!
Take Free Test
Detailed Solution
Lift on the wing =ρ2A(v12−v22)=22×5((30)2−(20)2) =5×500=2500N
Watch 3-min video & get full concept clarity