Answer:
The velocity of the recoil is 
Explanation:
Kinetic Energy

The mass of th gun is the both mass the shotgun and the arm shoulder combination

The velocity is negative because is in opposite direction of the bullet
The average distance between the variable scores and the mean in a set of data is the standard deviation.
Answer:
Explanation:
This is simple logic. If the top can spin 6000 times before it starts to topple, and each minute the top can spin 800 times,
6000/800 = 7.50 minutes