Final answer:
The velocity of an object in free-fall will be increasing after 6 seconds because it experiences constant acceleration due to gravity, which is 9.80 m/s² on Earth. Option A is correct.
Step-by-step explanation:
The velocity of an object falling from a high building, ignoring air resistance, will be increasing after 6 seconds of falling. This is because in the absence of air resistance, the only force acting on the object is gravity. Thus, the object will experience constant acceleration, which on Earth, is approximately 9.80 m/s². The velocity (v) after time (t) can be determined by the equation v = gt. Using this equation, after 6 seconds, the object's velocity will be v = 9.80 m/s² * 6 s = 58.8 m/s, assuming the object was initially at rest.
The velocity of an object falling from a high building, ignoring air resistance, will be increasing after 6 seconds of falling. This is because an object in free fall experiences a constant acceleration due to gravity, which averages 9.80 m/s² on Earth. The object's velocity will continue to increase as it falls, as long as air resistance is negligible.