How is an object's acceleration affected by its mass and the forces acting on it?

Notice how mass and force affect acceleration. The acceleration of an object increases with increased force, decreases with increased mass, and is in the same direction as the force.

At that time, you will learn that the acceleration of an object is directly proportional to force and inversely proportional to mass. Increasing force tends to increase acceleration while increasing mass tends to decrease acceleration.

Explanation:

Matter be cause it's needed on surface of the earth