Final answer:
The 22 kg ball rolling down a hill has the least amount of inertia compared to the other objects due to its smaller mass.
Step-by-step explanation:
Among the objects mentioned, the 22 kg ball rolling down a hill has the least amount of inertia if we are solely comparing the masses of the objects at face value without taking their velocities into account. Inertia is the resistance of any physical object to any change in its state of motion, including changes to its speed and direction. Inertia is directly related to the mass of an object—the greater the mass, the greater the inertia. Since all other objects listed (the 65 kg box, the 25 kg crate, the 50 kg cart) have greater mass compared to the 22 kg ball, they would possess more inertia.