A jet fighter pilot wishes to accelerate from rest at 5 g (five times the accele
ID: 1969609 • Letter: A
Question
A jet fighter pilot wishes to accelerate from rest at 5 g (five times the accelerationdue to gravity) to reach Mach 3 (three times the speed of sound) as quickly as possible.
Experimental tests reveal that he will black out if this acceleration lasts for more than 5 .0 s.
Use 331 m/s for the speed of sound.
(a) Will the period of acceleration last long enough to cause him to black out?
(b) What is the greatest speed he can reach with an acceleration of 5 g before blacking out? A jet fighter pilot wishes to accelerate from rest at 5 A jet fighter pilot wishes to accelerate from rest at 5 g (five times the acceleration
due to gravity) to reach Mach 3 (three times the speed of sound) as quickly as possible.
Experimental tests reveal that he will black out if this acceleration lasts for more than 5 due to gravity) to reach Mach 3 (three times the speed of sound) as quickly as possible. Experimental tests reveal that he will black out if this acceleration lasts for more than 5 .0 s.
Use 331 m/s for the speed of sound.
(a) Will the period of acceleration last long enough to cause him to black out?
(b) What is the greatest speed he can reach with an acceleration of 5 Use 331 m/s for the speed of sound. (a) Will the period of acceleration last long enough to cause him to black out? (b) What is the greatest speed he can reach with an acceleration of 5 g before blacking out?
Explanation / Answer
v=u+a*t u=0 3*331=5*9.8*t t=20.26s a)yes as the time is 20 sec b)v=u+a*t= =5*9.8*5 =245m/s
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