Final answer:
The subject of this question is projectile motion, which falls under the topic of kinematics in physics. Projectile motion occurs when an object is launched into the air and moves along a curved path under the influence of gravity.
Step-by-step explanation:
The subject of this question is projectile motion, which falls under the topic of kinematics in physics. Projectile motion occurs when an object is launched into the air and moves along a curved path under the influence of gravity.
In this scenario, the cannon is fired at an angle of 20.0° above the horizontal, and its recoil velocity can be calculated using the principles of momentum conservation. The vertical component of the cannon's momentum is transferred to the earth when it is fired.
The kinetic energy of the cannon can also be determined, and it is dissipated as heat transfer in shock absorbers that stop its recoil.