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dybincka [34]
3 years ago
5

Identical cannonballs are fired with the same force, one each from four cannons having respective bore lengths of 1.0 meter, 2.0

meters, 2.5 meters and 3.0 meters. Which cannon will have the minimum impulse on the ball if the force acting on the ball increases with the length of the bore?
Physics
2 answers:
jok3333 [9.3K]3 years ago
7 0

Answer:

1 meter

Explanation:

  • Think of it as distance smaller distance means less momentum and longer distance requires big momentum.
  • Therefore smallest bore length i.e. 1 meter will have minimum impulse.
ANEK [815]3 years ago
6 0
I think its options 2 idk man
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Answer:

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This is a kinematics exercise

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the initial position of car a is zero

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for car B

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car B's starting position is 30 m

         x = 30 + v_{ob} t - ½ 0.4 t²

at the point where they meet, the position of the two vehicles is the same

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let's reduce the speeds to the SI system

        v₀ₐ = 14.4 km / h (1000 m / 1 km) (1h / 3600s) = 4 m / s

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