Questions
A rocket set for vertical firing with a resultant acceleration of if the fuel is finished 2 minutes then the maximum height reached by the rocket
a
36 km
b
18 km
c
55 km
d
54 km
detailed solution
Correct option is D
U=0, a=5 m/s2, t=2×60=120sec S=h1From S=Ut+12at2⇒h1=125×120×120⇒h1=36kmVelocity gained by the rocket from V=U+at,V=0+5×120=600m/s The height attained after 2 sec is h2=V22g⇒h2=60022×10=18000m⇒h2=18kmTotal height attained by pocket H=h1+h2=36+18=54kmTalk to our academic expert!
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