Kinematics Question 525

Question: An aircraft moving with a speed of 1000 km/h is at a height of 6000 m, just overhead of an anti-aircraft gun. If the muzzle velocity of the gun it’s 540 m/s, the firing angle θ for the bullet to hit the aircraft should be

Options:

A) 73

B) 30

C) 60

D) 45

Show Answer

Answer:

Correct Answer: C

Solution:

[c] Displacement of aircraft in time t=horizontal displacement of projectile

972×518t=V0cosθ.t

cosθ=54×5540=12θ=60



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