gas-jet exerts a reactionary force on the rocket:
(a) In the backward direction
(b) In the forward direction
(c) Both (backward and forward direction)
(d) None of these
23. The outer cover of rocket is made of an highly insulating material so
that there may be no change of:
(a) Its burning due to the excessive heat developed
(b) Its burning due to the very high velocity
(c) Its bruning due to the friction of air
(d) None of these
24. When the velocity of the gas relative to the rocket is un the instantaneous
mass of an ascending rocket and fuel is m, the mass of gas emerges out
from the rocket is Am, At is the small time internal and g is acceleration
due to gravity, the effective acceleration of the rocket is :
Am
V, Am
(a)
(en
+ 8
(b)
-8
m
At
m т
AT
V, Am
in
At
(c)
(d) None of these
8
Answers
Answered by
1
Answer:
this is your answer
Explanation:
22.(a)
23.(c)
24.(b)
Answered by
1
Answer:
this is your answer
Explanation:
22.a
23.c
24.b
please mark as brainleast answer
Similar questions