What net external force is exerted on a 1450kg artillery she

What net external force is exerted on a 1450-kg artillery shell fired from a battleship if the shell is accelerated at 2.20 ? 10⁴ m/s²? (Enter the magnitude.)
N

What is the magnitude of the force exerted on the ship by the artillery shell?
N

Solution

net external force is exerted on a 1450-kg artillery shell=1450*2.2*10⁴

=31.9*10⁶ N

magnitude of the force exerted on the ship by the artillery shell= 31.9*10⁶ N in negative direction