During free fall, what is the acceleration of the projectile?

In free fall, the only force acting on the projectile is gravity, causing it to accelerate towards the Earth. The acceleration due to gravity near the Earth's surface is approximately 9.81 m/s². This means that for every second the object is in free fall, its velocity increases by 9.81 m/s.

This value is consistent regardless of the mass of the object, making it a universal acceleration for all objects in free fall in the absence of air resistance. Therefore, the acceleration of the projectile during free fall is indeed 9.81 m/s², reflecting the constant influence of gravitational force acting on it.