A) 2.8 km/s
B) 15.6 km/s
C) 22.4 km/s
D) 44.8 km/s
Correct Answer: C
Solution :
At a certain velocity of projection the body will go out of the gravitational field. of the earth and will never return to the earth, this velocity is known as escape velocity \[=243Hz\] Given, \[f=\frac{v}{v+{{v}_{s}}}\,\,f\] \[=\frac{320}{320+4}\times 240\] \[=237Hz\] \[=f-f=\] \[\Rightarrow \] \[n=243-237=6\]You need to login to perform this action.
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