When a 100 g ball is released from rest and another is thrown downward with a velocity of 10 m/s, both balls experience the same acceleration due to gravity (9.8 m/s²). This is because the acceleration due to gravity is constant for all objects near Earth’s surface, regardless of their mass or initial velocity. While the ball thrown downward has an initial velocity, the rate at which both balls accelerate is the same. This demonstrates that the acceleration due to gravity is independent of the object’s initial velocity, as long as air resistance is neglected.