an 8 kilogram ball is fired horizontally form a 1 times 10^3 kilogram cannon initially at rest after having been fired the momen

Question

2 years ago

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tum of the ball is 2.4 time 10^3 kilogram meters per second east calculate the magnitude of the cannons velocity after the ball is fired

2 answers:

Maksim231197 [3] · Answer 1 · 2023-12-04T14:20:33+03:00

After the ball is shot, the cannon will move at a speed of 2.4 m/s.

We must learn more about the rule of conservation of linear momentum in order to locate the solution.

How can I determine the cannon's post-ball velocity magnitude?

According to the law of conservation of linear momentum, a system's starting and ultimate velocities are equal.

Since the cannon's initial velocity is 0 in this case, the system's initial momentum will be equal to zero as well.

$m=8kg\\M=1000kg\\P_f=2.4*10^3kgm/s$

When a cannon fires a ball, the cannon will recoil quickly and in the opposite direction of the ball's motion.

$P_f=MV\\V=\frac{P_f}{M} =2.4m/s$

Thus, we can infer that the cannon's maximum speed once the ball is fired is 2.4 m/s.

Learn more about the conservation of linear momentum here:

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xeze [42] · Answer 2 · 2023-12-04T12:24:48+03:00

The magnitude of the cannons velocity after the ball is fired will be 2.4m/s.

To find the answer, we have to know more about the law of conservation of linear momentum.

<h3>How to find the magnitude of the cannons velocity after the ball is fired?</h3>

The law of conservation of linear momentum states that, the initial momentum of a system will be equal to the final momentum.
Here, then initial momentum of the system will be equal to zero, since the initial velocity of the cannon is equal to zero.
Given that,

$M_B=8kg\\M_C=1*10^3 kg\\P_f=2.4*10^3 kgm/s.\\$

When the ball is fired from the canon, then the cannon will have a recoil velocity in the opposite direction of motion of the ball.
Since it has a final momentum towards east, the recoil momentum will be in the west.
Thus, the velocity of the cannon after when the ball is fired will be,

$P_f=M_CV_C\\V_C=\frac{P_f}{M_C}=\frac{2.4*10^3}{1*10^3} =2.4m/s \\west$

Thus, we can conclude that, the magnitude of the cannons velocity after the ball is fired is 2.4m/s.

Learn more about the law of conservation of linear momentum here:

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