I think it’s true I may be wrong tho
Answer:small barrel gun
Explanation:
Given
Muzzle velocity of bullet is greater in short barrel gun as compared to larger barrel gun
acceleration is given by change in velocity with respect to time

In case of short barrel bullet time taken by bullet to reach its muzzle velocity is less therefore acceleration of small barrel bullet is more compared to long barrel bullet.
<span>spontaneity is the answer, hope this helps!!</span>
Acceleration required to stop rocket:
2as = v² - u²
a = -(18)²/(2 x 265)
a = 0.61 m/s² upwards
Resultant force = mass x acceleration
Resultant force = upwards thrust - weight
1.14 x 10⁴ x 0.61 = Thrust - 1.14 x 10⁴ x 1.6
Thrust = 2.52 x 10⁴ Newtons