Blade_Runner wrote:
According to Newton's third law, the forces on the two objects are equal in magnitude. While the forces are equal in magnitude and opposite in direction, the accelerations of the objects are not necessarily equal in magnitude. In accord with Newton's second law of motion, the acceleration of an object is dependent upon both force and mass. Thus, if the colliding objects have unequal mass, they will have unequal accelerations as a result of the contact force that results during the collision.
The 95 undamaged floors were still a solid structure when the top section of floors started to come down. The top section comprised only 15 floors. 15 damaged floors cannot crush 95 undamaged floors to earth in less than 15 seconds. The most obvious "unequal mass" is the 15 floors vs 95 floors. Which would defeat the other . . . without explosives being involved?