If I try to accelerate an object to the left, its mass resists that acceleration. If I try to accelerate an object to the right, the same resistance occurs. If I try to accelerate an object forward or backward, the same resistance occurs. This resistance to acceleration is known as inertia. Gravity is a constant acceleration. If I drop an object, its velocity is constantly increasing under the force of gravity, which means it is constantly accelerating. Therefore, since it is constantly accelerating, the object's mass should theoretically resist that acceleration the same way it did when it resisted acceleration to the left or to the right or forward or backward. This resistance to acceleration applies a force against the accelerating force. Therefore, this means that there is a force against gravity, since gravity is the accelerating force. Is this correct? Is there a force against gravity?