Answer a 30.0 kg shell is fired from a 2,000 kg cannon with a velocity of 500 m/s. what is the resulting velocity of the cannon?
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Ответ:
To calculate the resulting velocity of the cannon, we use the concept of conservation of momentum.
Here,
is the mass of cannon and its value is 2000 kg, 
is the mass of the shell which is fired from cannon and its value is 30.0 kg, 
is the velocity of shell and 
is the resulting velocity of cannon.
Substituting these values in above formula we get,
The cannon recoil with velocity of 7.5 m/s.
Ответ:
It is
in the same direction of the shell's velocity but in the opposite sense.
Explanation:
In order to calculate the velocity of the cannon, we are going to use the Momentum Conservation Law.
If the exterior resultant force acting over a particles system is nule therefore the momentum is constant.
We can calculate the momentum as
Where ''p'' is the momentum (a vectorial magnitude)
Where ''m'' is the mass of the object
And where ''v'' is the velocity (a vectorial magnitude)
In the exercise, the momentum is constant (because the exterior resultant force is equal to zero).
So we can write :
Where m1 is the mass of the shell
Where v1 is the velocity of the shell
Where m2 is the mass of the cannon
And where v2 is the velocity of the cannon.
Replacing all the data in the equation (I) :
If we solve to find v2 :
We find that the resulting velocity of the cannon is
Ответ: